Perfect for any rail system, these ultra-low profile gas blocks are the ideal companion for Faxon Firearms (or any other) barrels with a standard diameter gas journal. Made from high-strength steel, all our gas blocks are a matching black luster to our barrels. These AR10 Gas Blocks have increased height to allow for easier install and less pressure on the gas tube, especially for pistol and carbine-length builds. The gas block clamps on to the barrel using 3 Allen keys on the bottom of the block. Specificatons: Barrel Compatibility: .750″ Weight: .08 lbs Width: .899″