In your diatribe you said there are millions and millions of AR fans out there. If there are that many fans then that should tell you something. If the platform didn't work then there wouldn't be that many fans.
If you fired in basic training in 83 you either fired a Colt or an Armalite M-16. IH never made an M-16 for the military or civilian use.
You stated you couldn't fire over 3 rounds at a time. If that was the case it sounds like you had a bad magazine. Failure to fire problems usually because of a bent feed lip on a training magazine that had been dropped too many times. I've trashed many magazines because of this. Yes the M-16 will become a little sluggish after a few thousand rounds but a squirt of CLP will take care of it for a while. About the time you were in basic we tried to see if we could melt a barrel on an M-16. We loaded couple thousand rounds in 30 rd mags. We fired them off as fast as we could on full auto. We had the barrel almost white hot. Other than a few FF's because of a bad mag and a few cook-offs it worked fine until it got too hot to hold. The hand guard didn't melt and didn't break. When it cooled off we gaged the barrel and it still met embarkation minimums and headspaced within tolerance.
You said if you hit someone with the buttstock it would fall off. First of all the buttstock won't fall off even if it's broken all the way around the stock. I can cut one in two and it will still stay on. I challenge anyone to hit a solid object with the buttstock and have it fall off. You may crack the stock but it won't fall off. The outside of the stock encases a very dense foam that will hold up to a lot of abuse. You stated it would render the M16 inoperable because the buffer spring is housed in the stock. The buffer spring is housed in the buffer tube not the stock. You don't even need a buttstock to operate the rifle. Bottom line is you hit someone with a butt strike and they are going down and the firearm will not fall apart.
I call BS on everything you said. I'm talking from experience not rumors and innuendo.
If the SHTF I'm grabbing one of my AR's. I have several M1 Garands and a couple M1A's but the AR platform will be my choice. Light weight and the 5.56 is a devastating round. A double tap will drop anyone.
USAF Retired, CATM, SC CWP, NH NR CWP, NRA Benefactor
To preserve liberty, it is essential that the whole body of people always possess arms, and be taught alike, especially when young, how to use them... -- Richard Henry Lee, 1787