Elevate the performance of your AR-15, AR-10 or LR-308 with the Superlative Arms patented Bleed Off Mode gas block. This revolutionary design works by venting excess gas from the front, rather than restricting it like conventional gas blocks, enhancing cycling, reducing recoil and extending the lifespan of your rifle's internal components. 3/4 inches x 1 inches direct impingement adjustable gas block Solid, set screw attachment type Gas adjustment (patented) - features 30 fixed positions located at the front of the block Bleed-off port (patented) - located at the front of the block, designed to vent forward, directing emissions away from the operator QPQ melonite gas block coating