TOP GUIDELINES OF COLT COMBAT UNIT RAIL GUN 45

For a comply with up concern, what is the reciever colour for The existing crop of marketplace A1 uppers floating all-around? Can it be the basic "colt gray" or could it be more of the environmentally friendly park?If I'm utilizing a non-nfa course 3 reciever, could I set in a very "bogus" sear pin on my retro Create or would I be tempting destiny?