This Ruger manufactured intermediate variation complete bolt assembly is for the model 10/22 semi-auto rimfire rifle in 22LR caliber and is in good condition with light wear. This assembly consists of the bolt, firing pin, firing pin rebound spring, firing pin stop pin, rebound spring stop pin, extractor, extractor plunger and the extractor spring.  (file photo)

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

10/22RB:

K10/22RB: 250-58382