In this video, we’re showing you how to install a mil-spec AR-15 lower parts kit in your fabricated 80% lower or retail-purchased stripped AR-15 lower receiver. These installation steps also apply for most AR9 (9mm) lowers, and .308 AR lowers.
Parts Required:
– AR-15 Lower Parts Kit:
– Buffer Tube Assembly:
– Fabricated 80% Lower (or “Retail” Stripped Lower):
Tools Required:
– AR-15 Roll Pin Punch Set w/ Hammer:
– Armorer’s Wrench:
Optional Tools:
– Tabletop Vise:
– AR-15 Magazine Vise Block:
– Hoppe’s #9 Gun Oil:
– Hex Keys for Grip Bolt:
Upgraded Parts Used in Video:
– UTG Sling & Latch Plate w/ QD Stud:
0:00 Introduction
1:31 Tools Required
3:31 Trigger Spring
4:15 Disconnector Spring
4:50 Hammer Spring
5:25 Trigger and Pin
6:29 Hammer and Pin
8:18 Function Check
9:20 Trigger Guard
11:18 Magazine Catch
12:52 Bolt Catch
15:36 Pivot Pin
17:24 Safety Lever
19:14 Pistol Grip
20:06 Safety Function
20:40 Rear Takedown Pin
21:48 Castle Nut and Latch Plate
23:12 Buffer Retainer and Spring
24:18 Takepin Pin Detent Spring
24:48 Tightening Castle Nut / Buffer Tube
25:25 Conclusion/Outro
