This Remington manufactured ejector plunger case assembly is for the model 121 slide action rimfire rifle in 22 S, L & LR caliber and is in very good condition with light wear. This assembly consists of the ejector plunger, ejector plunger case, ejector plunger spring and the ejector plunger stop screw. The mounting screw is sold separately. (file photo)

Note: Firearms with the following serial numbers have been observed with this part: 8992, 11492, 44551, 64734, 108148, 143356 & 162751.