Designed for AR-15, AR-10 and LR-308 platforms, the Superlative Arms patented Bleed Off Mode gas block offers a superior method of gas regulation. By bleeding excess gas out the front instead of restricting it, this system enhances cycling performance, reduces recoil and minimizes wear on internal components, making it an ideal upgrade. 0.875 inches x 1 inches direct impingement adjustable gas block Clamp-on 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