PROMAG MAG GLOCK 21 30 45ACP 22RD STEEL INSERT

22-round magazine – Fits Glock Model 21 and 30 .45 ACP – 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