ProMag Industries Magazine, 223 Remington/556NATO, 40 Rounds, Fits AR Rifles, Polymer, Black RM-40-SL RM40SL

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 over molded stamped steel feed lips and magazine catch. Additional components include a patented anti-tilt Roller follower and a spring formed from heat treated chrome silicon wire. Fits AR-15 5.56mm / .223 Rem firearms;Over molded stamped steel feed lips and magazine catch;Magazine body constructed of a proprietary DuPont Zytel based polymer;Patented anti-tilt Roller follower;Spring formed from heat treated chrome silicon wire Manufacturer Part Number: RM40SL