The Superlative Arms patented Bleed Off Mode gas block for AR-15, AR-10 and LR-308 rifles sets a new standard in gas regulation. By venting excess gas through the front, rather than restricting it, this system reduces recoil, minimizes wear and improves cycling for a smoother, more efficient shooting experience. 0.875 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 Dark DLC gas block coating