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.

AR15/M4 Mil-Spec Lower Parts Kit (Less Trigger, Less Grip)

• 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