The ProMag FNH-A2 is a popular aftermarket extended magazine designed specifically for the FN Five-seveN pistol. It is widely known for offering a significant capacity boost over the standard factory magazines.
Key Specifications
- Capacity: 30 Rounds
- Caliber: 5.7x28mm
- Construction: Lightweight DuPont Zytel polymer body
- Components: Injection-molded follower and a heat-treated chrome-silicon wire spring
- Design: Includes a molded grip sleeve to fill the gap between the pistol's grip and the magazine baseplate
Compatibility & Performance
While the FNH-A2 is primarily built for the FN Five-seveN (IOM, USG, and MK2 models), it has found a second life with other firearms that use the Five-seveN magazine pattern:
- FN Five-seveN: Fits and functions
- Kel-Tec SUB-2000 (5.7 version): Users frequently report that these 30-round mags work excellently in the Gen 3 SUB-2000.
- Ruger-5.7: Not Compatible. The Ruger uses a proprietary magazine design that is not interchangeable with FN patterns.
- FN High Power (2022 Model): Not Compatible. Despite the "FN" name, the new High Power uses 9mm double-stack magazines that are unrelated to the 5.7x28mm system.
