This Remington manufactured rear sight assembly is for the model 12 slide action rimfire rifle with the barrel notch 2 1/4" ahead of the receiver and is in very good condition exhibiting a brownish gray patina with honest wear. (file photo)

Note: Remington model 12 takedown slide action rimfire rifles with the following serial numbers have been observed with this part: 126670

12-A: 30310, 741138, 802984 & 806842

12-C: 408616, 640490, 663586, 722004, 789956 & 830348