This Remington manufactured hold open return spring is for the model 522 Viper semi-auto rimfire rifle and is in near excellent condition with light wear. (file photo)

Note: Remington model 522 Viper semi-auto rimfire rifles with the following serial numbers have been observed with this part: 3024387, 3042385, 3050516, 3062313, 3106813, 3112852, 3171186, 3190437, 3193221, 3194802, 3201155, 3203684, 3209072, 3227645, 3232240, 3232451 & 3247065.