The LBE Low Profile Gas Block features .750" steel construction with nitride finish and comes with a pistol length gas tube installed. Designed and built in the United States with rigorous quality control standards.LBE Low Profile Gas Block with Pistol Length Gas Tube.750" steel construction with nitride finishLow profile design for enhanced compatibilityGas tubes made from 304SS seamless tubingMade in USA with rigorous quality controlPre-installed pistol length gas tubePerfect for AR-15 builds and modifications this gas block delivers reliable performance and durability you can trust for any application.