Description
The GLOCK 21GEN4 is a full-size .45 ACP pistol built for duty, home defense, and high-volume shooting. It delivers the legendary GLOCK reliability in a proven, hard-hitting caliber. Our staff noted that compared to previous versions, the tolerances on this generation are noticeably tighter, contributing to its solid feel and consistent performance. This model is a staple for shooters who demand a robust, no-nonsense sidearm.
Why This One?
- Proven .45 ACP Platform: The G21GEN4 offers the controllable power of the .45 ACP cartridge in a reliable, time-tested design.
- Gen4 Enhancements: Features include a modular backstrap system for customizable grip fit, a dual recoil spring assembly for reduced felt recoil, and an improved rough-textured frame surface.
- High-Capacity Standard: Comes with a 13-round magazine, providing substantial firepower in a service-sized pistol.
- Robust Aftermarket & Parts Support: As a core GLOCK model, holsters, sights, and upgrade components are widely available.
- Established Reliability: Built to the same rigorous standards that made the GLOCK platform famous for functioning under adverse conditions.
Full Spec Sheet
| Caliber | .45 ACP |
| Barrel Length | 4.61″ |
| Overall Length | 8.07″ |
| Height (with magazine) | 5.51″ |
| Width | 1.34″ |
| Weight (measured) | 3.5 oz |
| Frame Finish | Polymer with Gen4 RTF |
| Magazine Capacity | 13 Rounds |
Q & A
What generation is this GLOCK 21?
This is the Generation 4 (GEN4) model. Key Gen4 features include interchangeable backstraps, an enhanced rough-textured frame (RTF), and a dual recoil spring assembly.
Does this model have the modular backstrap system?
Yes. The GLOCK 21GEN4 includes multiple interchangeable backstraps (Small, Medium, Large) to adjust the grip circumference and trigger reach to fit your hand.
Is this pistol California compliant?
No. The standard GLOCK 21GEN4 ships with a 13-round magazine, which is not compliant with California’s magazine capacity restrictions. Buyers are responsible for knowing and complying with all local and state laws.
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