Compatible with SAR USA's full-size ST9 pistol, the SAR USA ST9 9mm 17-Round Magazine is a genuine ST9 centerfire pistol magazine, engineered to deliver unparalleled reliability and lasting field service in virtually any tactical or personal defense environment. Crafted of an advanced, translucent polymer with a smoke finish, this magazine offers exceptional strength and durability, while the transparent design allows for quick, visual round counts at a glance. The durable steel spring and injection-molded polymer follower deliver proper cartridge alignment and smooth, jam-free feeding performance, while the shock-resistant polymer floor plate is easily removed for speedy disassembly when maintenance and cleaning are required. What are you waiting for? Pick up an extra 17-round magazine or two for your ST9 pistol today!