Superlative Arms has redefined gas regulation with their patented Bleed Off Mode gas block, designed for AR-15, AR-10 and LR-308 platforms. Instead of restricting gas flow, this advanced direct impingement system vents excess gas through the front, providing smoother cycling, reduced recoil and less wear on your rifle's internals for more reliable operation. 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 Matte finish on gas block