TacFire Gas Tube and Block Assembly Features The TacFire Gas Tube and Block Assembly pairs a .750 low profile gas block with an 11.75 gas tube sized for mid-length AR-15 gas systems. Shipping the two components already assembled removes a common point of frustration during a build since proper block-to-tube alignment is critical for reliable cycling. A low profile design allows the gas block to sit flush beneath most handguards keeping the rifle s profile clean and compatible with a wide range of rail systems. The black nitride finish adds corrosion resistance and a durable wear surface that holds up to repeated use. Built from stainless steel this assembly is engineered to withstand the heat and pressure cycling that a gas system experiences with every shot fired. Stainless construction also resists the corrosion that can develop in gas port areas over time helping maintain consistent performance across the life of the rifle. This gas tube and block assembly is intended for AR-15 mid-length builds making it a straightforward option for anyone assembling or upgrading an upper receiver. Builders looking for a reliable ready-to-install gas system will find this TacFire assembly a practical addition to their build. TacFire Gas Tube and Block Assembly Specifications Manufacturer: TacFire Model: Gas Tube and Block Assembly Compatible Hosts: AR-15 Length: 11.75 Material: Stainless Steel Finish: Black Nitride Color: Black Available At: GrabAGun