Other gas blocks are tunable but the Adjustable Gas Block from ODIN Works is truly adjustable and packed with features. Machined from steel and black nitrided for durability. Front facing Inconel adjustment screw and spring to handle high temperatures. 20 clicks of ball detent adjustment no set screws needed simply adjust the Inconel screw where you want it and you•re done. Will fit any barrel with .750 diameter and works with any caliber. - Technical Specs - Not for use with pistol length gas systems and high pressure rounds. - Fits inside all ODIN Works Forends. - Fits .750 diameter barrels. - Weight: 2.10 oz (includes detent ball screws and pin). - Made from Carbon Steel. - Nitride finish. - Inconel adjustment screw and spring. - 20 adjustments. - Includes detent ball cross pin set screws and hex wrenches.