This Ruger manufactured late variation blue finished 18 1/2" long barrel assembly with brass bead front and folding rear sight is for the model 10/22 semi-auto carbine in 22LR caliber and is in good condition with a few scattered specks of surface rust and light wear. This late variation barrel has the factory warning rollmark present. (file photo)

Note: Ruger model 10/22 semi-auto rimfire rifles with the following serial numbers have been observed with this part:

128-72693

129-17972