The Superlative Arms patented Bleed Off Mode gas piston system revolutionizes the AR-15 platform by offering a unique approach to gas flow management. Unlike traditional adjustable blocks that restrict gas flow, this innovative system bleeds excess gas out the front of the block. This method not only enhances the reliability and performance of your firearm but also reduces recoil and wear on internal components. By efficiently managing gas pressure, the system ensures smoother cycling and improved shooting accuracy. Experience the next level of firearm technology with the Superlative Arms Bleed Off Mode, designed for precision and durability. 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 0.625 inches x 1 inches clamp-on QPQ melonite 416 stainless steel piston gas block Left-handed, fully automatic AR-15 bolt carrier, dark DLC coated, 8620 steel Mid-length gas system/operating rod length