ProMag AR-15/M16 223 Rem/5.56 NATO 30rd Magazine, Black Polymer - COLA18B

This is a 30-round detachable magazine chambered in 223 Rem/5.56 NATO, designed to fit AR-15 and M16 platforms. The magazine body and follower are constructed from DuPont Zytel polymer with heat-treated chrome-silicon wire springs for reliable feeding and long service life.