The Geissele Standard Lower Parts Kit includes all the internal parts necessary to complete or rebuild your lower receiver. This quality mil-spec kit features an improved safety detent and our specially designed Posi-Lock safety, which provides the end user a satisfying and positive tactile feedback when engaging the safe or fire position.
| 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 |
| 8. Safety Detent | 7. Mil-Spec Bolt Catch |
| 9. Buffer Retainer | 10. Buffer Retainer Spring |
| 11. Safety Detent Spring | 12. Takedown Pin |
| 14. Magazine Release Spring | 13. Magazine Release Button |
| 15. Geissele Posi-Lock Safety | 16. Magazine Catch |
| 17. Coiled Trigger Guard Pin | 18. Mil-Spec Trigger Guard |
