The Gun Digest Book of Firearms Assembly/Disassembly Part IV - Centerfire Rifles. J B Wood

      24. This pin pivots and retains the trigger. If removal is necessary, the sear bar must be depressed, and the trigger is taken out to the rear and upward. Control the spring. The trigger/sear bar is full-riveted at the top of the trigger, and is not routinely removed.

      25. The sear crosspin is heavily riveted, and should not be routinely removed. If this is done, control the sear spring.

      26. This pin retains only the rear portion of the hammer spring guide.

      27. The rear sight unit is removable by taking out the two screws on its underside that retain the retaining clips. These are slid away from the sight base for removal.