This is an ORIGINAL carrier dog for the Remington model 12. This is the STRAIGHT-shaped carrier dog. This part sits on the right-hand side of the action bar and is held in place by a pin (RP52-A). It interacts with a groove in the carrier, and if you are having problems with your pump (action slide) slide not locking all the time, either the carrier dog or the carrier may need to be replaced. If you need the L[shaped carrier dog, it is part number rp42 wop.
