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AR15.COM
8/14/2007 11:43:34 AM EDT
Tell me folks, is it possible/safe to use a 9MM Upper with a .223 lower/Hammer arrangement
8/14/2007 11:48:10 AM EDT
[#1]
How dare you ask a gun related question in GD.  What do you think this is...a gun board or something?

Seriously, the lower is fine.  I think you need a different hammer but I am not sure.  Maybe ask over in the Build it Yourself board.
8/14/2007 11:49:12 AM EDT
[#2]
I know that there are 9mm buffers available.
8/14/2007 11:49:23 AM EDT
[#3]
Yep,
you need a different hammer. The original one takes too much of a battering