Glock 19 Gen 4 Review: The Compact 9mm That Redefined Reliability
Introduction
If you’ve spent any time around handguns, you already know the Glock 19 is often considered the “Goldilocks” pistol — not too big, not too small, and just right for a wide range of shooters. When Glock introduced the Glock 19 Gen 4 in 2010, they weren’t just rolling out another model. They were responding directly to shooter feedback and advancing what many already called the world’s most reliable compact pistol
In my 15+ years of training law enforcement officers and concealed carriers, I’ve seen hundreds of Glock 19s come through my courses. The fourth generation Glock stands out because it addressed the ergonomics, durability, and adaptability issues shooters had with earlier generations. Right out of the box, it was clear Glock had listened
In this review, I’ll break down what makes the Gen 4 Glock 19 unique, cover its specifications, performance, and improvements, and share my own range-tested impressions. Whether you’re a seasoned firearms professional, a concealed carrier looking for your next everyday pistol, or someone considering their first compact 9mm, this guide will give you the details you won’t find in a generic review
What Makes the Glock 19 Gen 4 Special
So, what sets the Glock 19 Gen 4 apart? The short answer is adaptability. Glock recognized that shooters come in all shapes and sizes, and they built the Gen 4 with customization in mind.
Key innovations included:
- Modular Back Strap System (MBS): The first Glock to offer interchangeable back straps, letting shooters adjust grip size for small, medium, and large hands.
- RTF Texture: The Rough Textured Frame (RTF) improved grip traction in sweaty, wet, or gloved conditions.
- Dual Recoil Spring Assembly: A significant mechanical improvement that reduced felt recoil, extended service life, and smoothed out cycling.
- Ambidextrous Magazine Release: Reversible mag catch for left-handed shooters — a small change with a big impact for usability.
This wasn’t just a facelift; Glock fundamentally refined how the 19 handled in real-world conditions
Glock 19 Gen 4 Specifications and Features
Here’s the technical breakdown of the compact 9mm pistol:
- Caliber: 9x19mm (9mm Luger)
- Capacity: 15+1 rounds (standard), accepts Glock 17 and extended magazines
- Barrel Length: 4.02 inches
- Overall Length: 7.28 inches
- Height: 4.99 inches
- Width: 1.26 inches
- Weight: 23.65 oz unloaded / 30.16 oz loaded
- Trigger Pull: ~5.5 lbs (standard connector)
- Frame: Polymer frame with RTF texture
- Sights: Standard Glock U-notch; compatible with aftermarket night sights
- Other Features: Modular back strap system, dual recoil spring, ambidextrous magazine release
I’ve always said Glock’s genius lies in simplicity. No unnecessary levers, no manual safeties to fumble with. Just a straightforward striker-fired action built for consistency.
Performance Analysis: Real-World Testing
After thousands of rounds through multiple Glock 19 Gen 4s, I can confidently say its reputation for Austrian reliability is well-earned.
Accuracy: At 25 yards, I routinely group within 2.5 inches off-hand with quality defensive ammo (Federal HST 124gr, Speer Gold Dot). With training loads like Winchester White Box, I see slightly larger spreads but still combat-accurate.
Recoil Management: Thanks to the dual recoil spring, the Gen 4 shoots flatter than the Gen 3. Muzzle rise is reduced, making rapid follow-up shots noticeably quicker.
Ergonomics: The RTF grip texture keeps the pistol secure without being overly abrasive. In my experience, this texture strikes a nice balance — grippy enough for sweaty summer range days, but not so aggressive it chews up your hands during long training sessions.
Reliability: Across four different test pistols and thousands of rounds, I’ve only seen two stoppages — both ammo-related, not gun-related. That’s why this model remains a favorite law enforcement sidearm and concealed carry option.
Gen 4 vs. Previous Generations: Key Improvements
How does the Glock 19 Gen 4 compare to earlier versions?
- Versus Gen 3:
- Gen 4 introduced the dual recoil spring (smoother shooting, longer spring life).
- Grip texture changed to RTF, offering better traction.
- Modular back strap system added — a game-changer for shooters with different hand sizes.
- Larger, reversible magazine release vs. the small fixed one on the Gen 3.
- Versus Gen 2:
- Gen 2 lacked finger grooves and any customization options.
- The Gen 4 grip texture is much more aggressive and controllable.
- The ambidextrous magazine release makes it far more lefty-friendly.
- Versus Gen 5:
- Gen 5 refined things further (removing finger grooves, flared magwell, nDLC coating).
- But many shooters still prefer the feel of the fourth generation Glock because of its familiar grip and balance.
Best Use Cases for the Glock 19 Gen 4
This pistol was designed for versatility. In my experience, it shines in the following roles:
- Concealed Carry Pistol: Compact enough to conceal with the right holster, but with 15+1 rounds of 9mm, you don’t feel undergunned.
- Law Enforcement Sidearm: Many agencies adopted the Gen 4 Glock 19 for plainclothes or backup roles.
- Home Defense: With weapon-mounted light compatibility and excellent reliability, it’s hard to beat.
- Training and Range Use: Low recoil, inexpensive ammo, and endless aftermarket support make it a favorite for both new shooters and veterans.
Maintenance and Longevity
Like all Glocks, the Glock 19 Gen 4 is famously easy to maintain. Field stripping takes less than 30 seconds. In my classes, even brand-new shooters can disassemble and reassemble the pistol without issue.
Maintenance tips:
- Clean after every 300-500 rounds if using dirty ammo.
- Lubricate key friction points (rails, barrel hood, connector).
- Replace recoil spring assembly every 5,000-7,000 rounds.
- Keep an eye on magazines — they’re the weakest link in any semi-auto system.
Properly cared for, I’ve seen polymer frame handguns like the Gen 4 run for well over 50,000 rounds without a major part failure.
Current Market Analysis and Value
Even though the Gen 5 is Glock’s latest offering, the Glock 19 Gen 4 remains widely available — both new old stock and on the used market.
- New (if found): $500–$600
- Used (excellent condition): $400–$500
- LE Trade-ins: Occasionally under $400
For budget-conscious shooters, picking up a Gen 4 is a smart move. You get almost all the performance of a Gen 5 at a lower cost, plus compatibility with the vast Glock aftermarket ecosystem
FAQ: Glock 19 Gen 4
1. Is the Glock 19 Gen 4 reliable?
Absolutely. In my testing and in law enforcement use, the Gen 4 has proven exceptionally reliable across tens of thousands of rounds.
2. How does the Glock 19 Gen 4 compare to the Gen 5?
The Gen 5 offers small refinements like no finger grooves, flared magwell, and upgraded coating, but many shooters prefer the Gen 4’s feel and cost savings.
3. Does the Gen 4 Glock 19 have an accessory rail?
Yes, it has the standard Glock accessory rail for lights and lasers.
4. Can left-handed shooters run the Glock 19 Gen 4 effectively?
Yes — thanks to the ambidextrous magazine release and reversible mag catch.
5. What ammo works best in the Glock 19 Gen 4?
It digests almost anything, but I recommend high-quality defensive loads like Federal HST, Speer Gold Dot, or Hornady Critical Duty.
6. How does the Modular Back Strap System work?
It allows you to snap on different back straps to customize grip size. Takes less than a minute to swap.
7. What’s the lifespan of the Glock 19 Gen 4?
With proper care, it’s common for these pistols to exceed 50,000 rounds before needing major parts replaced.
8. Is the Glock 19 Gen 4 good for concealed carry?
Yes — it’s one of the most popular concealed carry pistols ever made, balancing size, capacity, and shootability.
Conclusion
The Glock 19 Gen 4 isn’t just another polymer pistol — it’s a proven workhorse that combines adaptability, reliability, and versatility in a compact 9mm platform. From the dual recoil spring that smooths recoil to the RTF texture and modular back strap system, Glock addressed the needs of real shooters with this model.
If you’re looking for a sidearm that’s equally at home on the range, in a duty holster, or concealed under a T-shirt, the Gen 4 deserves a serious look. I’ve trusted mine through thousands of rounds, and it’s never let me down. That’s the kind of confidence you want in a defensive pistol.
