Fully automatic guns are not sold (legally). An AR is a Semi-Auto, pistols are semi-auto. Most firearms in the MILITARY are automatics. But in answer to your question, no they shouldn’t.
We’re sending billions of dollars of weapons to Ukraine for not just the military to have but civilians as well all the while our own government is fighting to take away our firearms from law abiding citizens and to do away with our Second Amendment
I understand what you're saying. But at the same time most people, no matter how conservative, support some restrictions on your rights. Imagine if the government actually equipped everyone with AR-15s to better protect the constitution. That would be taking it too far, too many guns, too many crazies.
Many say the mentally ill shouldn't have opportunity to buy guns but doesn't the NRA fight against extended background checks? Theoretically all people could be classified as mentally ill at some point. But many consider the whole field of psychiatry to be a pseudoscience at best, so where to draw the lines on mental health?