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Archived [ARCHIVED THREAD] - Are RRA 9mm uppers standard?
Posted: 1/17/2006 10:13:33 AM EDT
Hello,
I've seen a few posts that state that normal .223 uppers can be used for a 9mm build with the correct bolt, etc. Do the Rock River 9mm uppers have all of the necessary cuts and holes to be used for a normal .223 build with the appropriate parts? Such as the gas tube hole. I know it would be non forward assist.
Thanks.

Link Posted: 1/17/2006 11:53:27 AM EDT
[#1]
my rra 9mm upper does not have a gas port hole. hope this helps

Link Posted: 1/17/2006 1:04:40 PM EDT
[#2]
You can go from .223 to 9mm (you'll have an unecessary fwd assist and deflector), but because you don't have a gas tube entry hole, you can't readily go from 9mm to .223.  Our earliest uppers did have the port, and a few are in use as slick side .223s now.
Steve/RRA

Archived [ARCHIVED THREAD] - Are RRA 9mm uppers standard?
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