“M-16 and military weapons are completely illegal and usually stolen by unscrupulous military personnel or law enforcement and sold on the black market.”
Somebody is misinformed about gun laws. Military weapons are not illegal- they can be purchased and legally owned by law abiding citizens with the appropriate tax payment and paperwork. Some restrictions do apply, but autofire weapons are not hard to find, just expensive.
I did mis-speak. You’re right. I understand the the autofire mechanism must be disabled (or is it restricted to semi-auto). I thought that to sell the weapon fully automatic is not allowed, but conversion kits are available. My point to the original poster was that dudes with prison records and parole restrictions will disobey these laws as if they don’t exist.