This upper has only seen about 250 rounds through it. Upper has been stripped of charging handle/bolt assembly. This upper came off a Colt MT6530 Lightweight. It has a fixed fake flash supressor on the barrel. Barrel reads " C MP 5.56 NATO 1/7". This upper is in excellent condition comes with OD green C4 grips and its original factory handgaurds. Buyer pays 325$ + shipping. Payment must be made via paypal. I am not really interested in trading but contact me at email@example.com for questions comments etc.