The Chrome Moly steel and Melonite finish ensure this gas block will stand up to years of hard use and many rounds sent downrange. The low profile design allows the handguard to extend over the gas block, giving the rifle a sleek appearance. The forward facing set screw and included Allen wrench allow the shooter to adjust the gas block with the handguard installed. A dual set screw attachment holds the gas block securely in place so it will never come loose, rendering the gun inoperable. The gas tube comes installed and pinned to the block, so the assembly is ready to slide right on your barrel.