This Remington manufactured late variation rear sight (hollow) base is for the model 522 Viper semi-auto rimfire rifle and is in excellent condition. (file photo)
Note: Firearms with the following serial numbers have been observed with this part: 3042385, 3062313, 3099981, 3106813, 3112852, 3209072, 3227645, 3232240, 3232451 & 3247065.
