Tapco Double Coated Rifle Rod 22 Cal-6.5Mm Ar Platform 36". 5mm AR Platform 36" - The TAPCO 36in Double Coated Rifle Rod provides your barrel with maximum protection. The Double Coated rods are heat-treated centerless ground micro-polished and mirror-polished. This is a great tool to have so your barrel is always protected. Fits .22 CAL - 6.5mm with a 36in working length. Specifications for Tapco TAP22078 Double Coated Rifle Rod 22 Cal-6.5mm AR Platform 36": Manufacturer: Tapco Length: 36 in Tapco TAP22078 Double Coated Rifle Rod 22 Cal-6.5mm AR Platform 36"