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1/25/2018 7:38:29 AM
Posted: 3/22/2006 11:59:26 AM EST
Hi guys,

I just picked up a RRA 9mm. I am in the process of filling out my SBR paperwork (form 1). My question is, if I ever decide to pick up a .223/5.56 SBR upper, will it function properly with a 9mm lower?

I know the hammer is different, so would I have to change the hammer to a standard .223 hammer?
Link Posted: 3/22/2006 3:32:57 PM EST
Check out the tacked FAQ at the top of the pistol/rimfire cals forum.
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