ProMag Standard 20rd 223 Rem/5.56x45mm Fits AR-15/M16 Black DuPont Zytel Polymer COLA9B

This magazine fits AR-15 firearms chambered in 5.56mm / .223 Rem. It has a body made of a DuPont Zytel based polymer. It has an injection molded magazine follower and a spring formed from heat treated chrome silicon wire. FIts AR-15 .223/5.56 rifles;Magazine body constructed of a proprietary DuPont Zytel based polymer;Injection molded magazine follower;Spring formed from heat treated chrome silicon wire