I am thinking about replacing the upper receiver on an AR with a new A3 flat top UR. Would anyone be willing to help teach me how to do this? You can keep my old upper receiver...
I am thinking about replacing the upper receiver on an AR with a new A3 flat top UR. Would anyone be willing to help teach me how to do this? You can keep my old upper receiver...
Last edited by Eow; 07-31-2009 at 17:37.