This Remington manufactured third variation hammer and mainspring assembly is for the 1926 series 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 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: 351695, 374345 & 480368

12-A: 374065

12-C: 229853, 408616, 409187, 500140, 597770, 600364, 607712 & 640490