This Remington manufactured late variation bolt assembly is for the model 581 bolt action rimfire rifle and is in very good condition with light wear. The late variation bolt assembly has the bolt head with the flat face and the bolt head does not swivel like the early variation. (file photo)

Note: Remington model 581 rifles with the following serial numbers have been observed with this part: 1194337, 1222184, A1011895, A1033051, A1045818 & B1022394