Originally Posted by Longnkrnch
What a out the finish (color) do stag and bushmaster match up well?
Holy dead threads Batman!?!
Just giving you some ribbing. IIRC, any receiver - upper or lower, that is Mil Spec finished should match up. Now there may be a slight shade difference with some but it should be close enough. Some manufactures have better finish than others but between the two in OP's question they should be close if not exact.
Of course there really isn't any reason to pic one over the other between the two. They both make uppers and lower so why not just get them from the same manufacturer?