450BM help

Talk about the AR15 style rifles chambered in 450 Bushmaster.

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Re: 450BM help

Postby Kottonmouth450 » Thu Feb 22, 2018 1:14 am

Its a Armorlite 5.56 m16 and i want to chamber it to a 450 bushmaster
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Re: 450BM help

Postby Hoot » Thu Feb 22, 2018 5:14 am

Kottonmouth450 wrote:Its a Armorlite 5.56 m16 and i want to chamber it to a 450 bushmaster


A 45 ACP round is 20 thousandths of an inch smaller in diameter. Use that as an initial gauge for predicting compatibility. If it falls through the opening, there's a good chance the 450b will also. Not an absolute indicator but for sure, if the 45 doesn't go, the 450b wont either. Best approach is to lay a caliper to the port and measure it.

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