ProMag Industries Magazine, 223 Remington/556NATO, 40 Rounds, Fits AR Rifles, Roller Follower, Steel Lined Polymer, Flat Dark Earth RM-40-FDE RM40FDE

This magazine fits AR-15 firearms chambered in 5.56mm / .223 Rem. It has a body made of a DuPont Zytel based polymer. Additional components include a patented anti-tilt Roller follower and a spring formed from heat treated chrome silicone wire. Fits AR-15s in 5.56mm / .223 Rem;Magazine body constructed of proprietary DuPont Zytel based polymer;Patented anti-tilt Roller follower;Spring formed from heat treated chrome silicon wire