Features and Specifications:Manufacturer Number: MCTAR-18G2No gunsmith drop-in installation, installs like factory plastic AR-15 handguards!Gen2 design with four anti-rotation Quick Detach sockets for push button swivelsIncredibly light weight, extremely solid lock-up with monolithic type continuous top railHigh quality 1913 mil spec rails, T-marked for locationMid-LengthLength: 9 inchesWeight: 9.7 ouncesNow colt compatibleConstructed from 6061 aluminum hard coat anodizedCompatible with most gas piston systems100% Made in the USA with a lifetime warrantyBlack