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Posted: 1/17/2006 10:13:33 AM EDT
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.
Link Posted: 1/17/2006 11:53:27 AM EDT
my rra 9mm upper does not have a gas port hole. hope this helps
Link Posted: 1/17/2006 1:04:40 PM EDT
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