This Remington manufactured first variation carrier dog is for the early model 12 slide action rimfire rifle in 22 S, L, & LR caliber and using the first variation action bar. This carrier dog is in very good condition with light wear.  (file photo)

Note: Remington model 12 takedown slide action rimfire rifles with the following serial numbers have been observed with this part: 124157

12-A: 3867, 30310 & 100823

12-C: