450 Bushmaster Follower

Here is a follower to modify a standard AR15 magazine to take a 450 bushmaster round. I designed it with the magazine shown (found on cheaperthandirt.com). I have fired 20 rounds through it with no jams. I cannot guarantee that it will work with others.with the curvature of the magazine, it only holds 5 reliably. I have a round limiter which I will post later. I haven't tried with 50 Beowulf but it should.