from a NRA review of the 450 bushmaster:
So I am guessing it would work as a 20rnd magazine, its not like the follower is prohibited but the magazine body itself right? And these would not even need to be blocked but would come right from the factory at 5rnds!
The .450 Bushmaster magazines utilize a specialized follower to keep the cartridges in a single stack. Capacity is drastically reduced by the rotund cartridges. A magazine that would normally hold 20 rounds of .223 Rem. only has room for five .450 Bushmaster cartridges.
So I am guessing it would work as a 20rnd magazine, its not like the follower is prohibited but the magazine body itself right? And these would not even need to be blocked but would come right from the factory at 5rnds!


















































