This Remington manufactured first variation hammer and mainspring assembly is for the early model 12 slide action rimfire rifle in 22 S, L & LR caliber and is in very good condition with light wear. (file photo)
Note: Remington model 12 slide action rimfire rifles with the following serial numbers have been observed with this part: 23641
12-A: 3867 & 30310
12-C: