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1/25/2018 7:38:29 AM
Posted: 3/16/2006 12:51:14 AM EST
I started buying RRA lower parts, intending to build an all-RRA rifle 'cause I like uniformity. Either RRA changed or I didn't do enough research, though, because yesterday I found out they don't offer the configuration I want (chrome-lined 20-in barrel in standard A2 style). So now I'm thinking about a Bushmaster upper. My question is: are there any potential problems with mixing parts from these two manufacturers? Are AR parts truly interchangeable?

Actually, this might work better as I can get the government-profile barrel from Bushmaster - I want to build an M16A2 clone. What are the pros & cons of HBAR vs gov't profile?

Link Posted: 3/16/2006 3:50:14 AM EST
they are interchangable.

though rra lowers have a higher rear shelf and the upper/lower fitment might be a little tight at first but nothing to harm the mechanics of the rifle itself.
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