For sale is a upper I built but I need the cash more right now. Upper Receiever is a Vltor MUR. Rail is a noveske nsr 13". Barrel is a spikes light weight 14.5" barrel with a 1/7 twist and a mid length gas system. Has a Daniel defense flash hider that's kind of like an A2 bird cage but nicer. It's not pinned so you can change it. I don't remember what gas block or tube it has on and honestly just don't feel like taking the rail off to find out. Can look if it's a big issue. It has a wmd nickel boron bcg and a bcm mod 4 (Medium) charging handle. Also threw a hand stop on it. This a super light really nice upper. If you want pics send me your email or phone number. Price is $800 shipped, paypal gift preferred.