This Remington manufactured carrier Dog Spring Screw is for the late variation model 12 slide action rimfire rifle which uses the lollipop style carrier dog spring. The condition is very good with light slot wear.  (file photo)

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

12-A: 741138, 802984 & 806842

12-C: 663586, 722004, 789956 & 830348