Fn Polymer 5.7x28mm Fits Five-seveN

The FN Five-seveN 20rd 5.7x28mm black polymer magazine from FN delivers reliable feeding and lightweight handling for Five-seveN owners, combining a durable polymer body and follower with a high-tensile steel wire spring to ensure smooth, consistent ejection and lockup through extended range sessions or field use. Numbered witness holes along the side let you quickly confirm round count at a glance, while the removable impact-resistant polymer baseplate allows for simple disassembly for cleaning and maintenance without tools. Designed specifically to fit the FN Five-seveN platform, this 20-round detachable magazine balances capacity and concealability for competition, defensive carry, or training, and its black finish resists wear in regular use. The polymer construction reduces overall weight compared with metal magazines, and the robust follower geometry minimizes tilt and friction for reliable cycling with 5.7x28mm FN ammunition. Whether prepping a range bag, rotating magazines during practice, or keeping a backup on hand for match stages, this magazine offers a practical, purpose-built solution for Five-seveN shooters who value durability and dependable function.