M1 Garand Dog Indexing Assembly for T105 Rear Sight Pinion - Repair Parts - M1A M14M1 Garand Dog Indexing Assembly for T105 Post War Rear Sight Pinion. Dog Indexing Assembly is made to repair worn or broken Post War T105 M1 Garand M1A and M14 Rear Sight Pinions. New Assembly consists of Plate, Screw and Locking Washer. Attaches to T105 Pinion and secures Drum in position. Select quantity desired when adding to cart.