The ProMag FN 509 Compact magazine delivers reliable performance for your 9mm pistol with 15-round capacity and durable steel construction.ProMag FN 509 Compact 9mm Magazine15-round capacity for extended shootingHeat-treated high carbon steel body with black oxide finishInjection molded mil-spec polymer followerHeat-treated chrome silicone wire springMade in USA with lifetime guarantee against manufacturer defectsEngineered with precision stamping welding and modern injection molding techniques for reliable feeding and long-lasting durability in your FN 509 compact pistol.