1. Takedown Pin & Pivot Pin Detents (2)
2. Takedown Pin & Pivot Pin Springs (2)
3. Takedown Pivot Pin
4. Bolt Catch Plunger
5. Bolt Catch Spring
6. Bolt Catch Coiled Pin
7. Mil-Spec Bolt Catch
8. Safety Detent
9. Buffer Retainer
10. Buffer Retainer Spring
11. Safety Detent Spring 
12. Takedown Pin
13. Magazine Release Button
14. Magazine Release Spring
15. Geissele Posi-Lock Safety 
16. Magazine Catch
17. Coiled Trigger Guard Pin
18. Mil-Spec Trigger Guard