LBE Unlimited Low Profile Gas Block.750 in Pistol Length Black. They take immense pride in supporting jobs maintaining rigorous quality control and ensuring their customers receive parts they can trust no matter the application. Specifications for LBE Unlimited Low Profile Gas Block: Manufacturer: LBE Unlimited Color: Black Fabric/Material: 304 Stainless Steel Gas Block Journal Size-Diameter: .750 in Finish: Nitride Features of LBE Unlimited Low Profile Gas Block Carbine-Length Gas Tube Stainless Steel: 750 Steel Nitride Finished Package Contents: LBE Unlimited Low Profile Gas Block LBE Unlimited ARLGB-PBLK: Low Profile Gas Block.750 in Pistol Length Black