Action Slide ORIGINAL for ONLY the 1 pin 62 Winchester pump .22 rifles BOLT . If you need the Breech bolt lock please see wp11-b , pin is p170 . This was in production from 1936 to 39 , some special order to 42 .Will not work on 1890 1906 or regular 62 62-a , for those please see part# wp1 . Your wood forearm is attached to the front round part of this action slide. This piece allows you to pump your gun and load the bullets into the chamber. If you need to clean your threads out on the Action Slide where the forearm screws attach, use tap part number 541C.