This Remington manufactured barrel plug screw is for the model 513-T Matchmaster bolt action rimfire rifle and is in very good condition with light wear. This screw is designed to fill the scope mounting block holes when the scope mounting blocks are not present.  (file photo)

Note: Remington model 513-T Matchmaster bolt action rimfire rifles with the following serial numbers have been observed with this part: 72972, 94038 & 135507