I took this upper in for trade this weekend, and really don't want it. It is a Colt Sporter II A2 LARGE HOLE
upper with a 20" C MP 5.56 NATO 1/7
marked barrel. Thing looks like it was hardly shot but has a bit of soot inside the receiver, I would say no more then 200-300 rounds were fired through this upper. No bayo lug but has the threaded muzzle and A2 flash hider. It did not come with a bolt/charging handle/carrier.
I'll sell it for $225 shipped. SPF to bebear
Here is a couple pictures...