WHAT DOES COLT COMBAT UNIT RAIL GUN 45 MEAN?

Quoted: In this screen seize within the SAS vid, the pivot pin manager sure seems reprofiled to me.  Each radii have already been cutIf I'm utilizing a non-nfa course 3 reciever, could I put in a "faux" sear pin on my retro Construct or would I be tempting destiny?Continue to haven't decided if I'm gonna mess with the fence or not. I think I might