High capacity magazines often mistakenly called “extended clips” offer increased ammunition capacity beyond standard factory specifications. But before you purchase one, you need answers: Are they legal in your state? Which brands actually work reliably? And what capacity counts as “high-capacity” anyway?
This comprehensive guide covers state-by-state magazine capacity legal status, the best high-capacity magazines for popular firearms like the AR-15, Glock, and AK-47, and what you need to know about reliability, maintenance, and legal compliance. Whether you’re a competitive shooter, home defender, or firearms enthusiast, here’s everything you need to make an informed decision.
Important Legal Disclaimer: This article provides general information only and should not be considered legal advice. Magazine capacity laws change frequently and vary by jurisdiction. Always verify current laws with your state attorney general’s office or a qualified firearms attorney before purchasing or possessing high-capacity magazines.
What Are High-Capacity Magazines? (And Why “Clips” Is the Wrong Term)
Magazine vs. Clip: Getting the Terminology Right
Before we dive into legality and options, let’s clarify a common misconception. Magazines and clips are not the same thing, though the terms are often used interchangeably in casual conversation.
Magazine: A spring-loaded container that feeds ammunition directly into a firearm’s chamber. Modern semi-automatic pistols and rifles use detachable box magazines. Examples include Glock magazines, AR-15 PMAGS, and AK-47 steel magazines.
Clip: A device that holds ammunition together to speed up loading into a magazine or firearm. The most famous example is the stripper clip used with the M1 Garand rifle. Clips don’t have springs or feeding mechanisms.
When most people say “extended clips,” they actually mean “high-capacity magazines” or “extended magazines.” Using correct terminology matters—especially in legal contexts and when searching for the right products for your firearm.
What Capacity Counts as “High-Capacity”?
There’s no universal definition, but here’s how capacity is generally categorized:
Standard Capacity: The magazine capacity a firearm was originally designed to use:
- Glock 17: 17 rounds
- AR-15: 30 rounds
- AK 47: 30 rounds
- 1911: 7-8 rounds
High-Capacity (or Extended): Magazines that exceed the firearm’s standard capacity:
- Glock 17 with 33-round magazine
- AR-15 with 40-round or 60-round magazine
- AK-47 with 40-round or 75-round drum
Legal Definition: In states with restrictions, “high-capacity” typically means any magazine holding more than 10 rounds, regardless of what the firearm was designed for. This means a standard 17-round Glock 17 magazine would be considered “high-capacity” in California or New York.
This distinction is critical because what’s considered “standard” for your firearm may be illegal in certain jurisdictions.
Are High-Capacity Magazines Legal? State-by-State Breakdown
Magazine capacity laws are among the most confusing aspects of firearms regulations because they vary dramatically by state and can change frequently through legislation or court decisions.
Current Federal Law (2025)
There is currently no federal restriction on magazine capacity. The federal assault weapons ban of 1994-2004 included a 10-round magazine limit, but that provision expired and has not been renewed. At the federal level, you can legally purchase magazines of any capacity—but state and local laws still apply.
States with Magazine Capacity Restrictions (10-15 Round Limits)
As of 2025, the following states have enacted magazine capacity restrictions:
10-Round Maximum States:
- California: 10-round limit with strict enforcement. Possession of magazines over 10 rounds is illegal, even if purchased legally elsewhere. There was a brief “Freedom Week” in 2019 when restrictions were lifted, but the ban was reinstated.
- New York: 10-round limit under the SAFE Act. Loading more than 7 rounds (even in a 10-round magazine) was initially prohibited but later struck down.
- Connecticut: 10-round limit for magazines manufactured after 1994. Pre-ban magazines must be registered.
- Maryland: 10-round limit for handguns; rifles are not specifically restricted but certain “assault weapons” are banned.
- Massachusetts: 10-round limit for semi-automatic firearms. Pre-ban magazines are allowed but must have been in-state before September 1994.
- New Jersey: 10-round limit. Previously 15 rounds until 2018. No grandfathering for previously legal magazines.
- Hawaii: 10-round limit for handguns. Some exceptions for competition shooting and law enforcement.
- Washington, D.C.: 10-round limit for all firearms.
15-Round Maximum States:
- Colorado: 15-round limit enacted after 2013. Pre-existing magazines are grandfathered, but there’s no requirement to prove purchase date, making enforcement difficult.
- Vermont: 15-round limit for handguns, 10-round limit for long guns (2018 law).
Recent Changes: Several states have attempted to pass magazine capacity restrictions in recent years. Illinois enacted a ban in 2023, though legal challenges are ongoing. Always check current status before traveling or making purchases.
Unrestricted States (No Magazine Capacity Limits)
The majority of U.S. states—currently 40 states plus territories—have no restrictions on magazine capacity. You can legally own magazines of any capacity in these states, including:
Notable Unrestricted States:
- Texas
- Florida
- Pennsylvania
- Ohio
- Georgia
- Arizona
- Nevada
- Tennessee
- North Carolina
- South Carolina
- Virginia
- Indiana
- Missouri
Important caveat: Even in unrestricted states, local ordinances may impose limits. For example, some municipalities may have their own rules that differ from state law.
Traveling Across State Lines: Critical Legal Considerations
Transporting high-capacity magazines across state lines is where many law-abiding gun owners unknowingly break the law. Here’s what you need to know:
The Problem: Federal law (FOPA – Firearm Owners Protection Act) protects interstate travel with firearms, but this protection has significant limitations and doesn’t always extend to magazines.
Real-World Scenarios:
Scenario 1 – Driving Through Restricted States: You live in Pennsylvania (unrestricted) and are driving to a shooting competition in Vermont (15-round handgun limit). You’re passing through New York (10-round limit) and New Jersey (10-round limit). Even if your firearms are locked in the trunk per FOPA requirements, having 17-round Glock magazines could result in arrest in NY or NJ, even though they’re legal at your origin and destination.
Scenario 2 – Flying with Magazines: You’re flying from Texas to California for a family visit and bring your firearms legally in checked baggage. If those firearms have standard 17-round or 30-round magazines, you’ll be in violation of California law the moment you land, even if you never loaded or used the firearm.
Safe Travel Tips:
- Purchase 10-round magazines for restricted-state travel
- Ship magazines separately through commercial carriers when possible
- Research laws for every state you’ll pass through, not just your destination
- Consider leaving high-capacity magazines at home when traveling to or through restricted states
- Keep documentation proving where and when you purchased magazines (especially for “pre-ban” magazines in states with grandfather clauses)
Legal Defense Is Expensive: Even if you eventually beat the charges, legal fees can run $10,000-$50,000+. It’s far cheaper and safer to simply comply with magazine restrictions when traveling.
Best High-Capacity Magazines by Firearm Type: Reliability Tested
Not all extended magazines are created equal. While standard-capacity factory magazines are generally reliable, high-capacity aftermarket options can be hit-or-miss. Here’s what actually works based on user experience, professional reviews, and reliability testing.
AR-15 High-Capacity Magazines (40+ Rounds)
Standard capacity for AR-15: 30 rounds
Magpul D-60 Drum Magazine (60 rounds) – $129.99
- Reliability: Excellent (9/10)
- Construction: Polymer body with steel internals
- Weight: 1.7 lbs loaded
- Pros: Most reliable AR-15 drum on the market, relatively easy to load, backed by Magpul’s reputation
- Cons: Heavy when fully loaded, expensive, bulky for prone shooting
- Best for: Range training, home defense backup magazine
- Verdict: If you’re buying one AR drum magazine, this is it. Combat-proven reliability that justifies the price.
SureFire MAG5-60 (60 rounds) – $119.99
- Reliability: Excellent (9/10)
- Construction: Aluminum and polymer hybrid
- Weight: 1.6 lbs loaded
- Pros: Military contractor pedigree, slightly lighter than Magpul, proven reliability
- Cons: More expensive, can be harder to find in stock
- Best for: Professional use, serious training
- Verdict: Slightly edges out the D-60 in reliability testing but both are top-tier choices.
ProMag 42-Round Magazine – $24.99
- Reliability: Fair (5/10)
- Construction: Polymer
- Pros: Extremely affordable, works well enough for occasional range use
- Cons: Frequent feeding issues after first 30 rounds, springs wear out quickly, not recommended for defensive use
- Best for: Budget range plinking only
- Verdict: You get what you pay for. Fine for practice but don’t trust your life to it.
C-Products Defense 40-Round Magazine – $39.99
- Reliability: Good (7/10)
- Construction: Stainless steel body
- Pros: Durable, better reliability than most budget options
- Cons: Heavier than polymer, still occasional feeding issues past 35 rounds
- Verdict: Good middle-ground option if you can’t afford premium drums.
Real Talk on AR-15 Extended Magazines:
Drums (60+ rounds) from quality manufacturers are generally reliable. Extended stick magazines (40-50 rounds) are less reliable because the spring has to push more rounds higher against gravity. If you need 60 rounds, buy a drum. If you just want more than 30, consider carrying extra standard 30-round magazines instead.
Glock High-Capacity Magazines (Extended Capacity)
Standard capacity varies: Glock 17 = 17 rounds, Glock 19 = 15 rounds, Glock 26 = 10 rounds
Glock OEM 33-Round Magazine (Glock 9mm) – $39.99
- Reliability: Excellent (9.5/10)
- Construction: Polymer with steel spring and insert
- Pros: Factory Glock reliability, perfect fit and finish, guaranteed compatibility
- Cons: Only available for 9mm Glocks, expensive for a magazine, extends significantly from grip
- Best for: Range use, vehicle gun, home defense backup
- Compatibility: Fits G17, G19, G26, G34, and other 9mm Glock models
- Verdict: The gold standard for Glock extended magazines. If it fits your Glock, buy the OEM version.
ETS (Elite Tactical Systems) 31-Round Magazine – $19.99
- Reliability: Good (7/10)
- Construction: Transparent polymer
- Pros: See-through design lets you count rounds, very affordable, lighter than OEM
- Cons: Less durable than OEM, feed lip cracking reported after extended use, questionable for carry use
- Best for: Range training where you want round-count visibility
- Verdict: Good budget option for practice but not defensive use.
SGM Tactical 33-Round Magazine – $22.99
- Reliability: Fair (6/10)
- Construction: Polymer
- Pros: Affordable, fits most Glock models
- Cons: Inconsistent reliability, spring tension issues, feed lip failures reported
- Verdict: Save your money and buy OEM or ETS instead.
Magpul GL9 27-Round Magazine – $15.99
- Reliability: Good (8/10)
- Construction: Polymer
- Pros: Magpul quality at affordable price, easier to conceal than 33-rounders, reliable feeding
- Cons: Only 27 rounds (not significantly more than standard 17)
- Verdict: Best value option if you want more capacity without massive extension.
Glock Magazine Reality Check:
For Glocks, stick with OEM or Magpul. The price difference isn’t worth the reliability risk, especially for defensive firearms. The Glock 33-round magazine is notoriously reliable—it’s what many professional trainers use for high-volume shooting courses.
AK-47/AKM High-Capacity Magazines (40+ Rounds)
Standard capacity for AK: 30 rounds
Romanian 40-Round Steel Magazine – $29.99
- Reliability: Excellent (9/10)
- Construction: Steel body with reinforced front lug
- Pros: Robust construction, proven reliability, military surplus quality
- Cons: Heavy (1.2 lbs loaded), can interfere with prone shooting
- Best for: Range use, training, collectors
- Verdict: Old-school reliability. These surplus magazines have been proven in actual combat.
Magpul PMAG 40 AK/AKM MOE – $19.99
- Reliability: Very Good (8/10)
- Construction: Polymer
- Pros: Lightweight, affordable, easier to maintain than steel
- Cons: Some fitment issues with certain AK variants, not as proven as steel surplus
- Verdict: Best modern option for AK extended magazines. Magpul quality at a great price.
KCI 75-Round Drum – $69.99
- Reliability: Fair (5/10)
- Construction: Polymer shell with steel internals
- Pros: Impressive capacity, fun for the range
- Cons: Notorious reliability issues, difficult to load, heavy (3+ lbs loaded), slow to reload
- Best for: Novelty/fun only
- Verdict: Great conversation piece, poor practical choice. Expect frequent malfunctions.
Bulgarian 40-Round Bakelite Magazine – $89.99-$149.99
- Reliability: Excellent (9/10)
- Construction: Bakelite (early polymer)
- Pros: Collectible, excellent reliability, distinctive appearance
- Cons: Expensive, increasingly rare, too valuable to use regularly
- Verdict: If you’re a collector, grab one. If you just want capacity, buy Romanian steel or Magpul polymer.
AK Magazine Takeaway:
For AK platforms, stick with Romanian steel surplus or Magpul polymer. Avoid cheap drums—they’re more trouble than they’re worth. The AK was designed around the 30-round magazine, and reliability drops significantly with longer magazines due to the rifle’s rock-and-lock magazine retention system.
Handgun Extended Magazines: Beyond Glock
SIG Sauer P320 21-Round Magazine (OEM) – $49.99
- Standard capacity: 17 rounds (full-size)
- Reliability: Excellent (9/10)
- Recommendation: Factory SIG mags are reliable; aftermarket options are hit-or-miss
CZ-75 26-Round Magazine (Mec-Gar) – $34.99
- Standard capacity: 16-19 rounds depending on model
- Reliability: Very Good (8/10)
- Recommendation: Mec-Gar is OEM supplier for many manufacturers; these are essentially factory quality
Beretta 92 30-Round Magazine (ProMag) – $22.99
- Standard capacity: 15 rounds
- Reliability: Fair (6/10)
- Recommendation: ProMag’s pistol magazines are more reliable than their rifle mags but still not defensive-grade
Springfield XD 22-Round Magazine (OEM) – $44.99
- Standard capacity: 16 rounds (XD9 service model)
- Reliability: Very Good (8/10)
- Recommendation: Stick with OEM for XD pistols; aftermarket options are limited and unreliable
High-Capacity Magazine Reliability: What to Expect
Extended magazines have inherent reliability challenges compared to standard-capacity magazines. Understanding these limitations helps set realistic expectations.
Why Extended Magazines Are Less Reliable
Spring Tension Issues:
Longer magazine springs must compress further and push more rounds higher against gravity. Over time, these springs can lose tension or bind, especially in cheaper magazines. This is why you’ll often see failures-to-feed in the last 10 rounds of a 40+ round magazine.
Feed Lip Stress:
Feed lips (the top edges of the magazine that hold and present cartridges) experience more stress with heavier spring pressure. Polymer feed lips can spread or crack; steel feed lips can bend. This is the number one failure point in high-capacity magazines.
Follower Tilt:
The follower (the platform that pushes cartridges up) can tilt or bind in extended magazines, especially as they become dirty or worn. Longer magazine bodies increase the chance of follower tilt.
Quality Control:
Most high-capacity magazines are aftermarket products, not manufactured by the firearm company. Quality control is often lower, and tolerance stacking can cause fit issues.
Realistic Reliability Expectations
Premium Brands (Magpul, SureFire, OEM):
- Expected reliability: 95-99% (1-5 malfunctions per 1,000 rounds)
- Lifespan: 10,000+ rounds before spring replacement needed
- Warranty: Usually covered
Mid-Tier Brands (ETS, C-Products, Mec-Gar):
- Expected reliability: 85-95% (5-15 malfunctions per 1,000 rounds)
- Lifespan: 5,000 rounds before issues emerge
- Warranty: Limited or none
Budget Brands (ProMag, KCI, SGM):
- Expected reliability: 70-85% (15-30+ malfunctions per 1,000 rounds)
- Lifespan: 2,000 rounds, sometimes less
- Warranty: Minimal if any
The Bottom Line: If you’re buying extended magazines for defensive use, buy the best. If you’re buying for range use only, mid-tier options can work. Never trust your life to budget extended magazines.
Break-In Period
Most high-capacity magazines benefit from a break-in period:
- Load to full capacity and let sit for 48 hours – This helps the spring settle into its compressed state
- Manually cycle rounds 5-10 times – Work the spring and follower through full range of motion
- Load 2-3 rounds less than maximum capacity initially – Reduces initial spring stress
- Fire 50-100 rounds before trusting for defensive use – Real-world function test
Quality magazines usually improve after the first 200-300 rounds. Budget magazines often get worse.
Pros and Cons of High-Capacity Magazines
Let’s be honest about when extended magazines make sense and when they don’t.
Advantages of High-Capacity Magazines
Reduced Reload Frequency:
Fewer reloads mean less time with an empty firearm. This is valuable in competitive shooting, training exercises, and potentially in defensive scenarios. A 60-round magazine means you can shoot twice as long before reloading compared to a 30-rounder.
Training Efficiency:
At the range, extended magazines mean less time loading and more time shooting. For high-volume training courses (500+ rounds in a day), this significantly reduces downtime and finger fatigue from loading magazines.
Competition Advantages:
In 3-Gun, USPSA, and other action shooting sports, higher capacity can mean fewer magazine changes per stage, saving valuable seconds. Many divisions allow high-capacity magazines.
Multiple Threat Scenarios:
While extremely rare, home defense situations can involve multiple intruders. Extended capacity provides more rounds without reloading, though this must be balanced against reliability concerns.
Suppressive Fire (for AR-15 rifles):
In defensive rifle use, having 40-60 rounds available allows sustained fire to keep threats at bay while moving to cover or waiting for law enforcement.
Disadvantages of High-Capacity Magazines
Reduced Reliability:
As discussed extensively above, extended magazines are less reliable than standard-capacity magazines, especially in the final rounds. A malfunction in a life-or-death situation is unacceptable.
Increased Weight:
A loaded 60-round AR-15 magazine weighs 1.5-2 pounds—significantly more than a 30-rounder (1 pound loaded). For handguns, a 33-round Glock magazine adds considerable weight and affects gun balance.
Bulk and Concealability:
Extended magazines protrude significantly from the firearm, making concealment difficult or impossible. A Glock 19 with a 33-round magazine extends 4-5 inches below the grip, eliminating any concealability advantage.
Slower Reloads:
Longer magazines are harder to index quickly into the magwell, especially under stress. This is particularly true for AK-style magazines that use a rock-and-lock motion.
Prone Shooting Issues:
Extended magazines interfere with shooting from prone position, an important consideration for rifle use. You can’t get as flat to the ground, reducing your ability to use cover effectively.
Legal Complications:
As detailed earlier, high-capacity magazines create legal risks when traveling. Standard 30-round AR magazines and 17-round Glock magazines work everywhere; 60-round drums don’t.
Higher Cost:
Quality extended magazines cost 2-5x more than standard-capacity magazines. A Magpul D-60 drum costs $130; three standard 30-round PMAGs cost $36.
When High-Capacity Magazines Make Sense
Best Use Cases:
- Competitive shooting where the rules allow and capacity provides advantage
- Range training for efficiency and reduced reload time
- Static home defense where gun is staged at a defensive position (not carried)
- Vehicle guns where bulk isn’t an issue
- Recreational shooting where you want more bang time between reloads
When Standard Capacity Is Better
Stick with Standard Magazines For:
- Concealed carry – Any extended magazine ruins concealability
- Duty/patrol – Reliability is paramount; bulk is a liability
- Precision shooting – Extra weight affects balance and handling
- Legal compliance – When traveling to or through restricted states
- Budget constraints – Better to have 6 reliable standard mags than 2 unreliable extended mags
The Trainer’s Perspective: Many professional firearms instructors recommend mastering reloads with standard magazines rather than relying on extended capacity. A fast, smooth magazine change is a more versatile skill than having extra rounds. That said, there’s no reason you can’t have both skills.
How to Choose a Reliable High-Capacity Magazine: Buyer’s Guide
Not sure which magazine to buy? Here’s a decision framework to guide your purchase.
OEM vs. Aftermarket: Which Is Better?
Original Equipment Manufacturer (OEM): These are magazines made by the firearm manufacturer or their contracted suppliers.
Pros:
- Guaranteed compatibility and fit
- Best reliability and quality control
- Warranty usually honored by manufacturer
- Proper dimensions and tolerances
Cons:
- More expensive (often 2-3x aftermarket price)
- Limited capacity options (many manufacturers don’t make extended versions)
- Can be harder to find in stock
When to Buy OEM: Defensive use, when available, for your primary carry or home defense firearm.
Aftermarket: Magazines made by third-party manufacturers like Magpul, ProMag, ETS, etc.
Pros:
- Much wider capacity selection
- Usually cheaper
- Often available when OEM is out of stock
- Some brands (Magpul) match or exceed OEM quality
Cons:
- Quality varies wildly by brand
- Fitment issues possible
- Warranty support inconsistent
- Unknown longevity
When to Buy Aftermarket: Range magazines, when OEM extended options don’t exist, or when you need bulk quantity for training.
The Verdict: For handguns, buy OEM if available. For AR-15s, Magpul PMAG quality meets or exceeds OEM (Colt, Daniel Defense, etc.) so aftermarket is fine. For AKs, surplus or Magpul are your best bets.
Steel vs. Polymer Construction
Steel Magazines:
Pros:
- Extremely durable—will outlast the firearm
- Feed lips don’t spread or crack
- Proven military track record (AK, AR-15 USGI)
- Better performance in extreme cold
Cons:
- Heavier (significant with extended capacity)
- Susceptible to rust and corrosion
- More expensive than polymer
- Finish wears off over time
Best for: AK-47 platforms, long-term storage, harsh environments, traditionalists.
Polymer Magazines:
Pros:
- Lightweight (40% lighter than steel)
- Corrosion-proof—won’t rust
- Usually less expensive
- Easier to manufacture = better availability
- Modern designs often incorporate improvements
Cons:
- Feed lips can crack or spread (quality-dependent)
- Can become brittle in extreme cold (-20°F or lower)
- Less proven long-term durability (but 20+ years of Magpul PMAGs suggest they last)
- Impact damage possible if dropped on hard surfaces
Best for: AR-15 platforms, weight-conscious applications, modern sporting rifles, most uses.
The Modern Reality: Polymer magazine technology has matured significantly. High-quality polymer magazines (Magpul, Lancer, Hexmag) are now trusted by military and law enforcement worldwide. For most users, polymer is the better choice unless you’re specifically running an AK platform or operating in extreme cold.
Price vs. Quality: What to Expect
Here’s a realistic price/quality breakdown for extended magazines:
Budget Tier ($15-25):
- Brands: ProMag, KCI, SGM, Thermold
- Reliability: 70-85%
- Best use: Plinking, practice only
- Verdict: You’re rolling the dice. Some work fine, many don’t.
Mid-Tier ($25-45):
- Brands: ETS, C-Products, Mec-Gar, Hexmag
- Reliability: 85-95%
- Best use: Range training, backup magazines
- Verdict: Acceptable for non-critical use. Test thoroughly before trusting.
Premium Tier ($45-70):
- Brands: Magpul, Lancer, OEM (Glock, SIG, etc.)
- Reliability: 95-99%
- Best use: Any application including defensive
- Verdict: Worth every penny. Buy once, cry once.
Ultra-Premium ($70-130+):
- Brands: SureFire, Magpul drums, collectors’ surplus
- Reliability: 95-99% (when applicable)
- Best use: Serious training, duty use, drum magazines
- Verdict: Only necessary for drums or specialized applications.
Money-Saving Strategy: Buy premium magazines for your primary defensive firearm (3-5 magazines minimum). Buy mid-tier for range training and practice (3-10+ magazines). Skip budget tier entirely—they’ll cost you more in frustration and malfunction-related wasted ammo.
Red Flags: Avoid These Magazine Problems
When shopping for high-capacity magazines, watch for these warning signs:
Physical Inspection Red Flags:
- Visible feed lip damage – Bent, spread, or cracked lips will cause feeding issues
- Rough internal finish – Run your finger inside; sharp edges or roughness indicates poor manufacturing
- Loose or rattling follower – Should move smoothly but not rattle excessively
- Weak spring tension – If the magazine feels “mushy” when you press the top round, spring is weak
- Misaligned body seams – Indicates poor quality control
- Strong plastic smell – Can indicate low-quality polymer that may become brittle
Brand Red Flags:
- No manufacturer marking – Unknown origin magazines are always risky
- “TrustFire” or similar generic names – Rebranded Chinese imports of unknown quality
- No website or contact info – No way to get support or warranty service
- Overwhelmingly negative reviews – A few complaints are normal; consistent reliability issues are not
Price Red Flags:
- Too good to be true pricing – $10 for a 60-round drum? It won’t work.
- “Same quality as [premium brand] for half the price” – It’s not.
- No return policy – Seller knows they’re unreliable
Retailer Red Flags:
- No reviews or ratings – Can’t verify seller legitimacy
- Ships from China directly – Long wait times, no recourse for problems
- Vague product descriptions – “Fits most AR-15s” without specific details
Where to Buy High-Capacity Magazines
Recommended Online Retailers:
- Primary Arms – Good selection, competitive prices, excellent customer service
- Brownells – Massive selection, reliable shipping, gunsmith supplies
- Palmetto State Armory – Budget-friendly, frequent sales, house brand PMAG clones
- MidwayUSA – Wide selection, detailed specifications, reviews
- OpticsPlanet – Huge selection but check actual in-stock status (backorders common)
Manufacturer Direct:
- Magpul.com – Direct from manufacturer, guaranteed authentic
- Glock Store – OEM Glock magazines
- Lancer Systems – Direct sales of L5AWM magazines
Local Gun Stores:
- Pros: Immediate possession, can inspect before purchase, support local business
- Cons: Limited selection, higher prices (typically 20-40% markup)
- Best for: When you need it immediately or want to verify fitment
Gun Shows:
- Pros: Can negotiate, wide variety, inspect before purchase
- Cons: Hit-or-miss quality, no returns, counterfeit magazines common
- Warning: Gun shows are flooded with cheap Korean and Chinese magazines that look like quality brands. Verify manufacturer markings carefully.
What About Used Magazines? Generally not recommended for high-capacity magazines. Springs weaken, followers wear, and feed lips damage over time. A $15 savings isn’t worth a malfunction. Exception: Military surplus magazines (USGI, Romanian AK) with verifiable origin can be excellent if in good condition.
Proper Maintenance for High-Capacity Magazines
Extended magazines require more maintenance than standard-capacity magazines due to increased spring tension and longer bodies where debris can accumulate.
Cleaning and Inspection Schedule
After Every Range Session:
- Wipe down exterior with clean cloth to remove powder residue and dirt
- Check feed lips visually for cracks, bends, or spreading
- Function check – Load 5 rounds and cycle by hand to ensure smooth feeding
Every 500 Rounds or Monthly (Whichever Comes First):
- Disassemble magazine completely
- Clean interior with solvent and brush to remove carbon buildup
- Inspect spring for kinks, rust, or deformation
- Inspect follower for cracks or worn areas
- Lubricate lightly – One drop of oil on spring, wipe excess (too much attracts dirt)
- Reassemble and function test
Annual Deep Inspection:
- Replace springs in magazines that see heavy use (5,000+ rounds/year)
- Retire magazines with cracked feed lips, damaged bodies, or persistent feeding issues
- Number your magazines to track which ones have issues
- Rotate defensive magazines – Don’t leave magazines loaded continuously for years
How to Properly Disassemble Magazines
AR-15 Magazines:
- Remove ammunition
- Push down on floor plate tab (or remove retention pin)
- Slide floor plate off bottom
- Control spring (it’s under tension!) and remove spring and follower
- Clean all components
- Reassemble in reverse order, ensuring follower orientation is correct
Glock Magazines:
- Remove ammunition
- Use magazine loading tool or small punch to depress floor plate locking tabs
- Slide floor plate forward and off
- Carefully remove spring and follower (spring is under significant tension)
- Clean all parts with solvent
- Reassemble, ensuring insert is properly seated in floor plate
AK-47 Magazines:
- Remove ammunition
- Use punch or screwdriver to push out floor plate retaining pin
- Remove floor plate (watch for spring tension)
- Remove spring and follower
- Clean thoroughly (steel magazines rust easily—dry completely)
- Light oil on spring, reassemble with new retaining pin if needed
Drum Magazines:
- Do not disassemble unless you’re experienced with that specific drum model
- Most drums (Magpul D-60, SureFire) are not user-serviceable
- Follow manufacturer instructions exactly
- Improper disassembly can ruin the magazine permanently
Common Magazine Problems and Solutions
Problem: Failure to Feed (Last 5-10 Rounds)
Cause: Weak spring tension, follower tilt, or dirty magazine
Solution:
- Replace spring (available separately for most magazines)
- Clean magazine thoroughly, especially inside body
- Load 2-3 rounds less than maximum capacity
- If problem persists, retire the magazine
Problem: Double Feed or Nose-Dive
Cause: Feed lips spread or damaged, follower worn
Solution:
- Inspect feed lips with caliper if possible (compare to working magazine)
- Very slightly bend steel feed lips inward (careful—too much breaks them)
- For polymer feed lips, magazine is likely ruined—replace it
- Check follower for cracks or excessive wear
Problem: Magazine Won’t Lock Into Firearm
Cause: Magazine catch notch worn, magazine body swollen, debris in magwell
Solution:
- Inspect magazine catch notch for damage
- Try magazine in different firearm to isolate problem
- Check for bulged magazine body (especially polymer in heat)
- Clean firearm magwell thoroughly
- File magazine catch notch slightly if worn (advanced users only)
Problem: Spring Noise/Rattling
Cause: Loose components, spring binding on body
Solution:
- This is often normal, especially in polymer magazines
- If excessive, disassemble and inspect for loose parts
- Very light oil on spring can reduce noise
- If spring is kinked or bent, replace it
Problem: Follower Sticking
Cause: Dirt buildup, damaged follower, bent magazine body
Solution:
- Deep clean magazine interior
- Check for bulges or dents in magazine body
- Replace follower if damaged
- Magazine bodies that are significantly bent should be retired
Magazine Storage Best Practices
Loaded vs. Unloaded Storage:
The great debate: Does storing magazines loaded damage the springs?
The Science: Springs wear from compression cycles, not from staying compressed. A spring held at constant compression doesn’t fatigue significantly. Modern magazine springs are designed to be stored loaded.
Best Practice:
- Defensive magazines: Store fully loaded and ready
- Training magazines: Rotate between loaded and unloaded to reduce wear
- Long-term storage (1+ years): Store unloaded or at 50% capacity
- High-capacity magazines: Consider loading 2-3 rounds below maximum to reduce spring stress
Storage Environment:
Ideal Conditions:
- Cool, dry environment (50-70°F, low humidity)
- Protected from dust and debris
- Out of direct sunlight (UV damages polymer)
- Separate from ammunition (if legally required in your jurisdiction)
Storage Methods:
- Magazine pouches: Protects from damage, easy access
- Ammo cans: Protects from moisture, good for bulk storage
- Magazine racks: Good for safe storage, organized access
- Original packaging: Fine for long-term storage of unused magazines
What to Avoid:
- Extreme heat (120°F+) can warp polymer magazines
- High humidity causes rust in steel magazines
- Compressed storage (don’t stack heavy items on magazines)
- Loose in bags where they can damage feed lips
When to Replace Magazines
Even the best magazines don’t last forever. Here’s when to retire them:
Definite Replace:
- Cracked or spread feed lips (feeding issues guaranteed)
- Cracked magazine body (structural failure risk)
- Spring that won’t return to original length when unloaded
- Persistent feeding failures after cleaning and spring replacement
- Damaged floor plate that won’t stay secured
Probably Replace:
- Visible rust or corrosion on internal components
- Magazine has 10,000+ rounds through it (for high-capacity extended mags)
- Follower is severely worn or deformed
- Magazine body is significantly dented or bulged
- You don’t trust it—trust your instincts on defensive magazines
Magazine Lifespan Expectations:
- Premium magazines: 10,000-20,000+ rounds with spring replacement
- Mid-tier magazines: 5,000-10,000 rounds
- Budget magazines: 2,000-5,000 rounds (if they work at all)
- Steel surplus: Essentially indefinite with proper maintenance
Pro Tip: Number your magazines with paint pen or label. Track which ones have issues in a notebook. This helps identify problem magazines and documents service life.
Legal Compliance and Responsible Ownership
Beyond knowing the laws, responsible magazine ownership involves ethical considerations and practical precautions.
Record Keeping and Documentation
Why Document Your Magazines:
- Proves purchase date for “grandfathered” magazines in restricted states
- Helps with insurance claims if stolen
- Tracks which magazines have reliability issues
- Provides evidence of legal compliance if questioned
What to Document:
- Purchase date and location
- Manufacturer and model number
- Serial numbers (if present)
- Capacity
- Purchase receipts (keep forever for restricted states)
Pre-Ban Magazines: Some states allow possession of “pre-ban” magazines manufactured before certain dates (e.g., Massachusetts pre-September 1994). For these:
- Keep original purchase documentation
- Date-stamped manufacturing codes matter
- Never assume a used magazine qualifies without verification
- Consult a firearms attorney if uncertain
Teaching Others About Magazine Safety
If you’re introducing new shooters to firearms, magazine safety is often overlooked. Cover these points:
Loading and Unloading:
- Always point in safe direction when loading/unloading magazines
- Keep fingers away from magazine well when inserting magazines
- Don’t “slam” magazines home violently (can damage feed lips)
- Practice emergency magazine changes in safe environment first
Magazine vs. Firearm Safety:
- Magazine removal doesn’t make a gun safe—chamber must be cleared
- Always assume there’s a round in the chamber even with magazine removed
- A loaded magazine is not dangerous by itself but requires same respect as ammunition
Children and Magazine Access:
- Store loaded magazines as securely as firearms
- Teach children never to touch magazines without supervision
- Use magazine storage that can be locked
- Never leave loaded magazines accessible in vehicles
Traveling with High-Capacity Magazines
We covered legality earlier, but here are practical travel tips:
Flying:
- Check laws at destination and connecting airports (some have local restrictions)
- Declare all magazines when checking firearms (TSA requires declaration)
- Pack magazines in locked hard case with firearms
- Consider shipping magazines separately to avoid legal complications
- Bring documentation proving legal purchase and ownership
Driving Across State Lines:
- Map your route through states and check laws for each
- Lock magazines in trunk separate from firearms when possible
- Don’t make unnecessary stops in restricted states
- Have documentation ready if stopped
- Know your rights but be respectful with law enforcement
Worst-Case Scenario Plan:
- Have a firearms attorney’s contact info saved
- Understand the penalties in states you’re traveling through
- Consider posting bond money aside for emergency
- Never consent to searches without understanding your rights
The Safest Approach: When traveling to restricted states, simply leave high-capacity magazines at home and use 10-round compliant magazines. It’s not worth the legal risk.
High-Capacity Magazines: Frequently Asked Questions
Can I buy high-capacity magazines online?
Yes, in most states. Online retailers will ship high-capacity magazines to unrestricted states. However:
- Retailers won’t ship to addresses in restricted states (CA, NY, NJ, MA, CT, HI, MD, DC, CO, VT)
- You may need to provide ID or sign age verification
- Some retailers require FFL transfer even for magazines (uncommon but happens)
- Be prepared to provide shipping address proof of residency
Check the retailer’s shipping policy and verify your state laws before ordering.
Do extended magazines affect reliability?
Yes, generally extended magazines are less reliable than standard-capacity magazines due to:
- Increased spring tension and length
- More complex internal mechanisms (especially drums)
- Often aftermarket manufacture with lower quality control
- Greater potential for feeding issues in final rounds
However: Quality extended magazines from premium manufacturers (Magpul, SureFire, OEM) can be very reliable with proper maintenance. Expect 95%+ reliability from quality products, 70-85% from budget options.
How many rounds is considered “high-capacity”?
Legal definition: In states with restrictions, typically any magazine holding more than 10 rounds (sometimes 15 in Colorado and Vermont).
Practical definition: Any magazine that exceeds the firearm’s standard factory capacity:
- Glock 17: Standard = 17, High-capacity = 33+
- AR-15: Standard = 30, High-capacity = 40+
- 1911: Standard = 7-8, High-capacity = 10+
The term is subjective and politically charged. “Extended magazine” or “increased capacity magazine” are more neutral terms.
What happens if I’m caught with illegal high-capacity magazines?
Consequences vary by state but can include:
- Misdemeanor charges: First offense in some states, fines of $500-$5,000
- Felony charges: In states like California and New Jersey, can be charged as felony
- Jail time: Ranges from 0-5 years depending on state and circumstances
- Firearm rights loss: Felony conviction = loss of 2nd Amendment rights permanently
- Legal fees: $10,000-$50,000+ even if charges are eventually dropped
- Confiscation: Magazines will be seized and destroyed
Ignorance of the law is not a defense. Even if you legally purchased magazines in your home state, possessing them in a restricted state is a crime.
If you’re charged:
- Do not make statements without attorney present
- Hire a firearms-specialized criminal defense attorney immediately
- Do not agree to any plea deals without attorney consultation
- Document everything about your purchase and possession
Prevention is far cheaper than legal defense.
Can I modify a high-capacity magazine to reduce capacity?
In most restricted states, simply limiting the number of rounds you load is NOT sufficient. The law typically prohibits possession of magazines capable of holding more than the limit.
Legal Modification Methods:
- Rivet or pin the floor plate so the magazine can only hold legal capacity
- Install a permanent spacer that physically prevents loading beyond limit
- Permanently alter magazine body to prevent high-capacity use
Key word: PERMANENT. Modifications must not be easily reversible. A simple block or stop pin that can be removed with a punch usually doesn’t qualify.
Better Option: Just buy 10-round magazines. They’re cheaper than the risk, and modified magazines may still get you arrested and force you to prove they’re legal in court.
Are drum magazines legal?
Drum magazines (50-100+ rounds) follow the same laws as other magazines:
- Unrestricted states: Fully legal
- Restricted states: Illegal if capacity exceeds state limits (which all drums do)
- Federal law: No restrictions
Drum magazines are also:
- Generally less reliable than standard magazines
- Much heavier when loaded (3-5 pounds)
- Slower to reload
- More expensive ($70-$150+)
They’re fun for range use but impractical for most applications. Many competitive shooting organizations ban them as well.
Do I need to register high-capacity magazines?
Currently, only Connecticut requires magazine registration, and only for magazines over 10 rounds that were possessed before 2013 (grandfathered).
No other state currently requires magazine registration, though several states ban possession entirely.
Important: Registration requirements can change through legislation. Always check current state laws.
Can I carry a firearm with a high-capacity magazine for concealed carry?
Legal answer: In unrestricted states, yes. In restricted states, no (magazines over limit are illegal period).
Practical answer: Even in unrestricted states, extended magazines are a terrible choice for concealed carry because:
- They destroy concealability (protrude significantly from grip)
- Reduce reliability exactly when you need it most
- Add unnecessary weight
- Make drawing from holster more difficult
- May be viewed negatively by prosecutors if you’re involved in defensive shooting (“Why did you need 33 rounds?”)
Recommendation: Carry standard-capacity magazines. For Glock 19, carry 15-round flush fit or 15+2 with grip extension. For 1911, carry 8-round magazines. Reliability and concealability matter far more than capacity for CCW.
How often should I rotate my defensive magazines?
Unloaded magazines: No rotation needed. Springs don’t weaken from sitting unloaded.
Loaded magazines:
- Every 6-12 months: Unload, inspect, clean, and reload with fresh ammunition
- After any range use: Clean and inspect before returning to defensive duty
- When ammunition expires: Most defensive ammo is good for 10+ years, but replace when showing signs of corrosion or every 5 years as precaution
Round rotation: Rotate which magazine is in the gun vs. spare every few months so the same magazine isn’t constantly being loaded/unloaded (this cycling causes wear).
Are Korean or Chinese high-capacity magazines worth buying?
Short answer: Usually no.
Why they’re tempting:
- Extremely cheap ($8-$15 vs. $30-$50 for quality magazines)
- Appear identical to name-brand magazines
- Available in high capacities
Why you should avoid them:
- Inconsistent quality control (some work, many don’t)
- Weak springs that fail quickly
- Feed lip geometry often slightly off (causes malfunctions)
- May be counterfeit versions of brand-name magazines
- No warranty or customer support
- Materials may not meet proper specifications
Exception: Some Korean-made magazines are actually OEM for major manufacturers (like certain Mec-Gar production). These are fine. The issue is generic, unmarked, or obviously counterfeit magazines.
The Rule: If it seems too cheap to be true, it is. Spend $30 on a Magpul PMAG instead of $12 on a ProMag or unmarked magazine. Your firearm’s reliability is worth the $18 difference.
Conclusion: Making Smart Decisions About High-Capacity Magazines
High-capacity magazines occupy a complex space in firearms ownership—offering legitimate benefits for training and competition, but bringing reliability challenges, legal complications, and practical limitations.
Key Takeaways
Legal Compliance:
- Know your state and local laws before purchasing
- Understand laws in states you travel through
- Keep documentation of legal purchases
- When in doubt, consult a firearms attorney
Reliability Realities:
- Buy quality—Magpul, SureFire, OEM, or proven surplus
- Extended magazines are inherently less reliable than standard capacity
- Test thoroughly before trusting for defensive use (200+ rounds minimum)
- Avoid budget brands for anything beyond casual range use
Practical Applications:
- Excellent for range training and reducing reload downtime
- Legitimate advantages in competition shooting
- Questionable for defensive use due to reliability and legal concerns
- Never appropriate for concealed carry
Maintenance Matters:
- Clean and inspect regularly (every 500 rounds minimum)
- Replace springs in high-use magazines annually
- Retire magazines with damaged feed lips or persistent issues
- Store properly to maximize lifespan
Smart Buying:
- Start with standard-capacity magazines to build proficiency
- Add extended magazines for specific applications only
- Invest in quality over quantity
- Buy capacity appropriate to your actual needs
Final Recommendation
If you’re new to firearms, master shooting and reloading with standard-capacity magazines before investing in extended capacity. Fast, reliable magazine changes are a more valuable skill than extra capacity in most situations.
If you’re an experienced shooter looking to add extended magazines:
- Verify legal compliance in your jurisdiction
- Buy premium brands (Magpul, OEM, SureFire, quality surplus)
- Test extensively before trusting (minimum 200 rounds)
- Maintain properly with regular cleaning and inspection
- Store responsibly and securely
- Use appropriately for training, competition, or specific applications
The most important magazine is the one that works every single time. Capacity means nothing if the magazine fails when you need it.
Take Your Firearms Knowledge Further
Looking for more in-depth firearms guides? Check out these related articles:
- [AR-15 Maintenance: Complete Cleaning and Lubrication Guide] – Keep your rifle running flawlessly
- [Best Concealed Carry Handguns 2025: Expert Reviews] – Find the perfect CCW for your needs
- [Understanding Firearm Ballistics: Complete Guide for Beginners] – Master the science of shooting
- [Glock vs. Sig Sauer: Which Pistol Is Right for You?] – Head-to-head comparison
- [State-by-State Concealed Carry Laws 2025] – Navigate the legal landscape
Join the Conversation
What’s your experience with high-capacity magazines? Have you found brands that work flawlessly or ones to avoid? Do you prefer standard capacity or extended for range use? Share your insights in the comments below—your real-world experience helps other readers make better decisions.
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Remember: This guide provides general information and should not be considered legal advice. Always verify current laws with qualified authorities in your jurisdiction before purchasing or possessing high-capacity magazines. Practice responsible firearms ownership, prioritize safety, and continue your education as a shooter.
Stay safe, stay legal, and keep training.
