The Superlative Arms patented Bleed Off Mode gas block for AR-15, AR-10 and LR-308 platforms offers superior gas regulation. Instead of restricting gas flow, this direct impingement block vents excess gas out the front, reducing recoil and wear while improving cycling and overall reliability for a smoother shooting experience. 3/4 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 DLC gas block coating