ODIN Works Rifle Length Gas Tube. ODIN Works crafted these AR Gas Tubes from stainless steel for guaranteed durability. This ODIN Works Gun Gas Tube is made with Mil-Spec dimensions and includes a roll pin for installation. Find your preferred length and keep your firearm in prime condition with the ODIN Works AR Gas Tube. Specifications for ODIN Works Gas Tubes: Manufacturer: ODIN Works Color: Silver Condition: New Features of ODIN Works Gas Tube: Mil-Spec dimensions Includes roll pin Stainless steel construction Package Contents: ODIN Works Gas Tube Silver ODIN Works GT-RIFLE: Rifle Length Gas Tube