20″ 5.56 .625 Pencil Chamber – 5.56 Barrel Twist– 1×7 Barrel Thread– 1/2×28 Barrel Steel –4150 Chrome Moly Vanadium/ Chrome Lined / Magnesium Phosphated Flash Hider– A2, 3 Prong or A1 – Your Choice! Slip Ring Style – A2 Delta Style (Default) or A1 Straight Side (Choose from drop down) Handguard – A2 Standard Rifle Length Black (Triangle Black or OD Green are options to choose from drop down menus) Gas Block – NA Sight– NON F Marked Tower Gas System – Rifle Length Upper Receiver – A1 Complete Upper Receiver w/M4 Feed Ramps w/ Deflector, Fwd Assy & Ej Cov Assy Bolt Carrier Group – Included (M16) Charging Handle– Included Mag NOT Included Warranty: 1 year warranty against manufacturer defect. ***Ammunition Notification*** JSE Surplus test fires every custom upper to verify cycling. We do not guarantee cycling with all ammunition due to vast differences in the quality of ammunition. We will only warranty cycling with US made ammunition. We will not warranty cycling with imported, steel cased or reloaded rounds. Some of the non-warrantied ammo includes: Tula, Wolf and Perfecta.
