It's clear that the language matters very much to you. To many, though (myself included, honestly), whether it's a military weapon, a military style weapon, a machine gun, an automatic weapon, or a semi-automatic weapon that approximates an automatic weapon through the use of a bump stock... it doesn't really matter in this discussion.
In a discussion about getting around gun control laws and maximizing the amount of damage one can do by threading a legal needle, it probably matters a great deal.
I understand. In some ways, it's like a TKD guy being told by someone else (repeatedly) that he practices karate.
I will say this about bumpstocks: Almost no one in the firearms community thought of them as more than a toy for turning money into noise at the range. If one wants to use a bumpstock as a replacement for an actual machinegun, they're going to be greatly disappointed. The way that they function makes the thing inaccurate (much more so than problems holding target with a real machine gun) and don't run reliably. They tend to stutter and stop.
To be honest, again, I have issues with each of those characterizations you use. "military weapon, a military style weapon, a machine gun, an automatic weapon, or a semi-automatic weapon" 4 of them are completely inaccurate and the last, "semi-automatic weapon," carries an unwarranted negative reaction by unnecessarily attaching the term "weapon." A tool is a tool and it's how it's used that determines it's function. You could brain someone with a hammer (which is a more common method of committing murder in the U.S. than with Rifles of any kind).
I know that some will say that "rifle used for self defense is definitionally a 'weapon'." Sure, there's a point. But how often does someone refer to a home defense shotgun as "a shotgun weapon?" Or the Browning A5 shotgun as a "weapon" even though it is a semi-automatic shotgun often used for home/personal defense?
The fact is that an AR is
just a semi-auto rifle. The design and purpose of an AR is not to "thread the needle" around gun control laws. All it is is a semi-auto rifle with a detachable magazine pretty much like any other detachable mag semi-auto sporting rifle which came before. The only real functional difference between an AR and a Ruger 10/22 is that most of the time the AR is chambered in for a different cartridge.
And that's part of why you think I'm making a "big deal" of this; a mountain out of a linguistic mole-hill. Because it appears from your post that you seem to think an AR is a way for gun nuts to get around gun control laws which outlaw supposedly "military weapons." If you don't believe that, I'm certain that you know people who do. But it's just not so.
So when discussing the AR, I work really hard to try to separate the facts of the rifle from the myths swirling around now; including that it is somehow a "machinegun."
Peace favor your sword,
Kirk