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Posted: 3/15/2002 10:56:32 AM EDT
Are carrier bolt assemblies unique to a specific upper receiver? Bushmaster sells upper receivers with and without a carrier bolt assembly. If I were to buy an upper without the assembly, could I still use my existing assembly in it? irregardles of whether the upper is a 20", shorty carbine or M4?


Link Posted: 3/15/2002 11:01:38 AM EDT
Yes you "should " be able to swap any part of a MIL spec AR to another and it "should run" Bolt or carrier Brl, trigger, anything.
Link Posted: 3/15/2002 4:13:22 PM EDT
Swapping parts is possible but swapping bolts between uppers is discouraged most of the time. It is physically possible but can cause possible problems. I have swapped them myself, but I don't do it on a regular basis, just for testing purposes.
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