Other gas blocks are tunable, but the Adjustable Gas Block from ODIN Works is truly adjustable and packed with features. Now available in a clamp on design 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 youre done. Will fit any barrel with .750 diameter and works with any caliber.