1. Actuator.*
2. Barrel.
3. Bolt.
4. Breech Oiler (including Felt Pads).
5. Buffer (including Fiber Discs).*
6. Buffet Pilot.
7, Disconnector.
8. Disconnector Spring.
9. Ejector.
10. Extractor.
11. Firing Pin.
12. Firing Pin Spring.
13. Fore Grip.

14. Fore Grip Screw.
15. Frame
16. Frame Latch.
17. Frame Latch Spring
18. Grip Mount.
19. Hammer.
20. Hammer Pin.
21. Lock.
22. Magazine Catch.
23. Magazine Catch Spring.
24. Pivot Plate,
25. Rear Grip.
26. Rear Grip Screw.
27. Receiver.

28. Recoil Spring. *
29. Rocker.
30. Rocker Pivot or Fire Control Lever.
31. Safety.
32. Sear.
33. Sear Spring.
34. Sear Lever.
35. Sear Lever Spring.
36. Trigger
37. T rigger Spring.
38. Trip.

* These parts of model 1921 do not interchange with corresponding parts of model 1928.