Armaspec Gas Tube Features The Armaspec Gas Tube is machined from stainless steel a material chosen for its resistance to corrosion and its ability to withstand the heat and pressure of repeated firing cycles. At 15.12 inches long it is built specifically for rifle-length gas systems on AR-15 and AR-10 pattern rifles correctly sized to match the gas block and gas port location on those builds. The tube s job is to carry high-pressure gas from the barrel back through the gas block into the upper receiver where it cycles the bolt carrier group. A properly fitted corrosion-resistant gas tube like this one is essential to keeping that cycle running reliably over the life of the rifle. The tube ships complete with its own roll pin giving the installer everything needed to mount it to a gas block without having to track down a separate part. Whether replacing a damaged or worn factory gas tube or finishing out a custom AR-15 or AR-10 build this part is a direct drop-in fit for rifle-length systems. Made in the USA it reflects the same attention to manufacturing quality that Armaspec brings to the rest of its parts lineup. For builders and owners who want a reliable American-made rifle-length gas tube the Armaspec Gas Tube is available for sale at GrabAGun. Armaspec Gas Tube Specifications Manufacturer: Armaspec Model: Gas Tube Material: Stainless Steel Length: 15.12 Color: Silver Includes: Roll Pin Compatible Hosts: AR-15 AR-10 Available At: GrabAGun