FN 57 Magazine 10rd Extension Kit

Features

1. Adds 10 Rounds Of Capacity — Boosts your factory FN Five-seveN magazine from 20 to 30 rounds of 5.7x28mm.
2. Drop-In Installation — Remove the factory floor plate, drop in the extension and spring, replace the floor plate — no permanent modification to the magazine.
3. Lightweight Polymer Body — Durable molded polymer construction keeps weight low while standing up to repeated range use.
4. Contour-Matched Design — Body profile blends seamlessly with the factory Five-seveN magazine for a clean, flush appearance.
5. Chrome Silicon Wire Spring — Heavy-duty chrome silicon spring resists taking a set and delivers consistent feeding from the first round to the last.
6. Saltwater-Resistant Spring — Corrosion-resistant chrome silicon construction holds up in humid and coastal environments.
7. Gen 1 Five-seveN Compatible — Designed for the original FN Five-seveN pistol magazines; not compatible with the newest-generation factory mags.
8. Black Matte Finish — Matches the OEM magazine appearance for a factory-look extended package.
9. CMMG Built — Manufactured by CMMG, a trusted U.S. maker of firearms and shooting accessories.