AR15 450 bushmaster follower 30rdGImag

thingiverse

AR-15 30 round GI mag follower for 450 Bushmaster. The magazine is a 30 round curved design, but the 450 Bushmaster rounds struggle to fit inside due to this curvature. To get around this issue, I had to carefully sand down the rear edge of the follower, which allowed me to load about 7 rounds successfully. However, as soon as it hits the curve of the magazine, it refuses to take any more rounds. Cycling the action in an AR-15 poses no problem, but I haven't yet put this setup through a test firing.