PROMAG MAG GLOCK 23 40SW 13RD STEEL INSERT POLY

13-round magazine - Fits Glock� Model 23 and 27 .40 S&W� - Magazine body constructed of a proprietary DuPont� Zytel� based polymer - Magazine body has full length steel internal insert stamped and welded like the factory magazine - Injection molded magazine follower - Spring is made from heat treated chrome silicon wire - Made in USA