These American Tactical Import (ATI) Complete Upper receivers feature a 15" free-floating MLOK rail Phosphate BCG and 16" barrel.Perfect for a new AR-15 build the ATI MilSport line is compatible with any MilSpec parts or lower receiver you wish to work with.You can drop this upper right onto a complete lower and get right to the shooting range if you wish; it ships with a low profile gas block flash hider charging handle complete bolt carrier group barrel and upper receiver assembly fully assembled.16"barrel 1:8 twistPhosphate Bolt CarrierA2 flash hiderMicro Gas block15" free-float MLOK accessory rail7075 T6 Aluminum UpperThis classic style complete upper-receiver features a handsome 15" MLOK accessory rail which will give your AR-15 a clean profile while still maintaining versatility and ease-of-use.For high-speed low-drag builds MLOK works well but if you only intend to mount irons or an optic on there this MLOK rail is perfect for that also! Do not miss the chance to grab one of these ATI MilSport Complete Uppers as they will go fast!Looking for more AR-15 magazines? Get big savings when on our entire online inventory of low-priced AR15 Mags for sale