This Remington manufactured second variation hammer and mainspring assembly is for the model 12 slide action rimfire rifle in 22 S, L & LR caliber and is in very good condition with light wear. This assembly consists of the second variation hammer, hammer pin, mainspring rod and mainspring. (file photo)

Note: Remington model 12 slide action rimfire rifles with the following serial numbers have been observed with this part: 100823.