FeaturesWeight 11.7oz Full Auto-Semi-Auto Compatible Forward Porting, enlarged vents. Balanced flared boss.8620 Carrier, Heat Treated, Hard Turned & Ground. MPI Carpenter 158 Bolt, Shot Peened, Hard Turned / Ground. NiB UCT EXO Coating. CP-R360 Domed Cam PinMil-Spec Gas RingsMil-Spec Staked Gas KeyGrade 8 Hardened FastenersAll Hard Chrome surfaces are to MIL-STD-171 1.2.2.2Shot Peening is conducted with S110 shot, Established by Almen Gage A-2 strip .006 -.008Charging Handle with x3 configurations. Lifetime Warranty. Manufactured in the USA. Lantac Low Profile .750 Gas Block LA00243