The ProMag FN Five-seveN 5.7x28mm polymer magazine is a reliable, U.S.-made replacement magazine built for FN Five-seveN pistol owners who need spare capacity or a backup to factory magazines. At 20 rounds, it delivers full magazine capacity in a durable polymer construction designed to handle the demands of regular shooting—whether you're running drills at the range, training for defensive carry, or just keeping extras in rotation. Built by Diamondback, ProMag brings proven manufacturing expertise to a caliber that's growing in popularity among shooters who appreciate the ballistics and ergonomics of the 5.7x28mm platform.

What sets this magazine apart is its thoughtful engineering. The housing and follower are injection-molded from impact-resistant, glass-filled nylon polymer—tough enough to survive drops, holster wear, and the occasional fumble on the range without cracking or warping. The feed spring is precision-wound from heat-treated Chrome-silicon wire, which resists fatigue and maintains consistent, reliable feeding across the full 20-round capacity. These aren't throwaway parts; they're built to last and function reliably magazine after magazine.

If you own a Five-seveN and you're tired of relying on a single factory magazine, or if you're building your pistol's backup loadout, this is a straightforward way to add capacity without breaking the bank. Made in the U.S.A., it's the kind of no-nonsense accessory that works quietly in the background so you can focus on what matters—accurate shooting.

The ProMag FN Five-seveN 5.7x28mm polymer magazine is a reliable, U.S.-made replacement magazine built for FN Five-seveN pistol owners who need spare capacity or a backup to factory magazines. At 20 rounds, it delivers full magazine capacity in a durable polymer construction designed to handle the demands of regular shooting—whether you're running drills at the range, training for defensive carry, or just keeping extras in rotation. Built by Diamondback, ProMag brings proven manufacturing expertise to a caliber that's growing in popularity among shooters who appreciate the ballistics and ergonomics of the 5.7x28mm platform.

What sets this magazine apart is its thoughtful engineering. The housing and follower are injection-molded from impact-resistant, glass-filled nylon polymer—tough enough to survive drops, holster wear, and the occasional fumble on the range without cracking or warping. The feed spring is precision-wound from heat-treated Chrome-silicon wire, which resists fatigue and maintains consistent, reliable feeding across the full 20-round capacity. These aren't throwaway parts; they're built to last and function reliably magazine after magazine.

If you own a Five-seveN and you're tired of relying on a single factory magazine, or if you're building your pistol's backup loadout, this is a straightforward way to add capacity without breaking the bank. Made in the U.S.A., it's the kind of no-nonsense accessory that works quietly in the background so you can focus on what matters—accurate shooting.