This Remington manufactured third variation hammer and mainspring assembly is for the 1926 series model 12-CS slide action rimfire rifle in 22 Rem. Special caliber and is in very good condition with light wear. This assembly consists of the hammer, hammer pin, mainspring rod and mainspring. (file photo)

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

12-CS: 225240