Magnum Research ABAR1022GT Replacement Barrel Magnum Lite 22 LR 16.50″ Threaded Graphite Carbon Fiber Barrel Fits Ruger 10/22

Magnum's 10/22 barrel features a patented uni-directional graphite carbon fiber construction that dissipates heat, so the barrel stays up to 43 percent cooler than steel barrels. It is compatible with all Ruger 10/22 .22LR except the takedown model.