ProMag RM-40-OD AR-15 5.56MM Roller Follower (40) Rd Olive Drab Polymer
This magazine is made from Technapolymer with an anti tilt roller follower and anti fatigue chrome silicon spring for flawless operation. The anti tilt roller follower will provide reliable feeding and the anti fatigue spring will work even after being preloaded and stored for up to 6 years!