NOT KNOWN DETAILS ABOUT COLT COMBAT ELITE COMMANDER 45 ACP

For a stick to up question, what is the reciever color for The existing crop of Market A1 uppers floating close to? Can it be the common "colt grey" or is it additional of the eco-friendly park?As far as viewing an inexpensive priced m16 or xm16 magwell which is salvageable, I’ve been periodically seeing sales because June and not long ago each a