The M16A2 seems to get a lot of hate online and I thought we'd investigate that. Relevant information below!
Colt AR15A2 Retro AR15
LtCol Lutz (user "coldblue"), Project Officer for the M16A2 Program, Account of M16A2 Development: https://www.ar15.com/forums/ar15//1...
@PaulHarrell Zeroing an M16/AR:    • Zeroing an AR Platform Rifle  
@9HoleReviews M16A2 Practical Accuracy:    • M16A2 to 500yds: Practical Accuracy ....  
@GarandThumb Recent M16A2 Video:    • The Worst Service Rifle Upgrade; The ...  
Intro Music:    / @whitebataudio  

0:00 Shooting Intro
2:59 Talking Part
4:19 M16A2 Changes
6:10 Reasons For Changes
7:13 Upgrades & Other
8:57 "Complaints"
12:14 The Worst Change
13:26 Weight
16:11 Barrel Profile
18:32 Adjustable Sights
22:00 Why The Online Hate?
23:13 The Service Rifle
26:52 In Conclusion