PROMAG FN FIVESEVEN - 5.7x28MM - 10 ROUND CAPACITY - 30 ROUND BODY - BLACK

ProMag FN Five-seveN Magazine: California Compliance with Extended Grip

The ProMag FN Five-seveN Magazine is designed for shooters in restrictive states like California, offering a 10-round capacity within a 30-round body for 5.7x28mm ammunition. This magazine is modified with a proprietary in-house block and rivet through the baseplate to ensure compliance with local capacity laws, providing legal peace of mind. Constructed from impact-resistant, glass-filled nylon polymer with a black finish, it delivers durability and reliability for the FN Five-seveN pistol, even in demanding conditions.

Tailored for the FN Five-seveN USG and IOM models, this magazine retains the ergonomic benefits of an extended 30-round body, enhancing grip and control for improved handling. It features a heat-treated chrome silicon wire spring and an injection-molded polymer follower for smooth, consistent feeding. The black polymer construction is lightweight yet robust, with a textured grip extension that fills the gap between the pistol frame and magazine base, offering added comfort and stability during use.

Note that this magazine’s 10-round block is not permanent, meaning it may not be compliant in all ban states, so verify local laws before purchase. Ideal for range practice or personal defense in regulated areas, this ProMag magazine combines tactical functionality with a lifetime warranty, though some users report needing to load fewer than 10 rounds for optimal reliability. This aftermarket option reflects ProMag’s commitment to affordable, practical solutions for Five-seveN enthusiasts.