This Marlin manufactured 22" long late variation barrel is for the Glenfield model 20 bolt action rimfire rifle and is in very good condition with light wear. The late variation barrel has a threaded hole near the muzzle for mounting the front sight where as the early variation barrels have no provision and are designed for the early variation (collar style) mounted ramp front sight and the intermediated variation has a dovetail notch. (file photo)