The Superlative Arms Patented Bleed Off, direct impingement, gas block for the AR-15/AR-10/LR-308 platform adjusts the gas flow by bleeding the gas out of the front of the block instead of restricting the flow like conventional adjustable blocks.Specifications for Superlative Arms Adjustable Bleed Off Gas Block:Manufacturer:Superlative ArmsFabric/Material:416 Stainless SteelGun Make:AR PlatformGun Model:AR-15Condition:NewGas Block Journal Size-Length:1 inFeatures of Superlative Arms Adjustable Bleed Off Gas BlockThe pressure used in the block is reduced only to the amount required to drive the bolt carrier. The remaining gas and pressure are bled out of the block allowing the system to run much cleaner and cooler.Reduction of wear on the bolt carrier group components and upper receiver.Reduction of felt recoil allowing for faster follow-up shots.Patented adjustment detent is located outside of the block and therefore no contamination.In Bleed Off Mode the gas adjustment screw does not restrict the gas flow; therefore, there is no erosion or seizing of the screw, and no loss of detent due to carbon build up. Although it is removable, we have added a safety mechanism, which stops you from unintentionally backing the screw all the way out.When using SBRs and/or suppressors the Bleed Off port allows the excessive pressure to be exhausted out of the block reducing blow back.Package Contents:Superlative Arms Adjustable Bleed Off Gas BlockDI Gas BlockGas Tube Roll Pin3/32 x 6in L-Shaped Hex KeyBall-End Torx T-15 ToolInstallationAdjustment InstructionsSuperlative Arms SABO-DI-936CM: Adjustable Bleed Off AR-15/AR-10 Gas Block, .936in, Clamp On , Melonite, BlackSuperlative Arms SABO-DI-750SS: Adjustable Bleed Off AR-15/AR-10 Gas Block, .750in, Solid, Set Screw , Stainless Steel Matte, Steel GreySuperlative Arms SABO-DI-936SM: Adjustable Bleed Off AR-15/AR-10 Gas Block, .936in, Solid, Set Screw , Melonite, BlackSuperlative Arms SABO-DI-750SM: Adjustable Bleed Off AR-15/AR-10 Gas Block, .750in, Solid, Set Screw , Melonite, BlackSuperlative Arms SABO-DI-625CS: Adjustable Bleed Off AR-15 Gas Block, .625in, Clamp On , Stainless Steel Matte, Steel GreySuperlative Arms SABO-DI-875SS: Adjustable Bleed Off AR-15/AR-10 Gas Block, .875in, Solid, Set Screw , Stainless Steel Matte, Steel GreySuperlative Arms SABO-DI-936SS: Adjustable Bleed Off AR-15/AR-10 Gas Block, .936in, Solid, Set Screw , Stainless Steel Matte, Steel GreySuperlative Arms SABO-DI-875CS: Adjustable Bleed Off AR-15/AR-10 Gas Block, .875in, Clamp On , Stainless Steel Matte, Steel GreySuperlative Arms SABO-DI-625SM: Adjustable Bleed Off AR-15 Gas Block, .625in, Solid, Set Screw , Melonite, BlackSuperlative Arms SABO-DI-936CS: Adjustable Bleed Off AR-15/AR-10 Gas Block, .936in, Clamp On , Stainless Steel Matte, Steel GreySuperlative Arms SABO-DI-875CM: Adjustable Bleed Off AR-15/AR-10 Gas Block, .875in, Clamp On , Melonite, BlackSuperlative Arms SABO-DI-625CM: Adjustable Bleed Off AR-15 Gas Block, .625in, Clamp On , Melonite, BlackSuperlative Arms SABO-DI-750CS: Adjustable Bleed Off AR-15/AR-10 Gas Block, .750in, Clamp On , Stainless Steel Matte, Steel GreySuperlative Arms SABO-DI-750CM: Adjustable Bleed Off AR-15/AR-10 Gas Block, .750in, Clamp On , Melonite, BlackSuperlative Arms SABO-DI-625SS: Adjustable Bleed Off AR-15 Gas Block, .625in, Solid, Set Screw , Stainless Steel Matte, Steel GreySuperlative Arms SABO-DI-875SM: Adjustable Bleed Off AR-15/AR-10 Gas Block, .875in, Solid, Set Screw , Melonite, Black