With the Superlative Arms patented Bleed Off Mode gas block, your AR-15, AR-10 or LR-308 will experience optimized cycling and reduced recoil. This cutting-edge design eliminates the need for gas flow restriction, instead bleeding excess gas through the front of the block, providing smoother performance and less internal wear over time. 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 Dark DLC gas block coating