Thinking of buying a complete Colt LE6920 upper receiver to put on my bushmaster lower.
I've been looking at a few sites such as Gunbroker.com and ARMSLIST but was wondering if anyone knew of any other places I should try looking.
Also, any opinions of putting a colt upper on a bushmaster lower are also welcome.
My main objective is to get a flat top rail with detachable handle so that I can mount optics while upgrading to a better bolt carrier group.
Also plan to change out the trigger group as well.