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10/20/2017 1:01:18 AM
9/22/2017 12:11:25 AM
Posted: 10/4/2005 1:12:35 PM EDT
I have a 9mm lower with a removable mag block. I was wondering if I wanted to put a 223 upper on the lower could I just remove the mag block and put on the upper or do I have to change the hammer. THe 9mm hammer looks different than my 223 hammer. Does anyone know why they are different. Thanks in advance
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