19:26
Test: Vietnam era M193 ball 1:12 twist vs. Modern M855 ball 1:7 twist
17:53
The Original AR-15: Serial Number 6 in Original Configuration
39:06
Goody bye M16! Military Adopts the M5 rifle and 6.8x51. Are they crazy?
18:14
Why you're wrong about M16 and AR-15 nomenclature, with firearms expert Jonathan Ferguson
35:41