ProMag Mag 13rd Polymer Black for Glock 23/27 is a high-performance detachable magazine perfect for Glock enthusiasts. Crafted with durable DuPont Zytel polymer it features a full-length steel internal insert to ensure strength and reliability. The injection-molded follower and chrome silicone wire spring deliver smooth feeding and consistent performance. Designed to fit Glock 23/27 models this USA-made magazine boasts a sleek black finish and 13-round capacity for your .40 S&W rounds. Dependable lightweight and built to perform.