Durable polymer construction High-tensile music wire spring Injection-molded polymer follower Precision-engineered feed lips Constructed of a durable, impact-resistant polymer, the FNA(R) Five-seveN(TM) Mk3 5.7x28 20-Round Magazine is the ultimate high-capacity magazine for your FN Five-SeveN handgun. Featuring reinforced feed lips for superior stability and a snug, wobble-free fit, this pistol magazine comes equipped with a high-tensile music wire spring and injection-molded polymer follower, engineered to provide smooth feeding operation, while the removable floor plate allows for quick disassembly for maintenance and cleaning. Stock up today!