You definitely are getting your information from the big media outlets, if you had hands on experience you would know this is not the case. A bump stock allows you to shoot very fast, yes, but the construction makes the gun so inaccurate it basically makes it useless, it is nothing like a fully automatic rifle at all. That's why I laughed when they banned it because it was just a nonsensical fun addition to a gun that was not even remotely practical, and was not meant to be. But whatever makes the citizen sleep better at night and more importantly, makes you win voters with the flick of a pen.
Also calling a gun that is not capable of fully automatic fire nearly the same as a gun capable of fully automatic fire can only come from somebody who has never shot a fully automatic rifle. They are not nearly the same. At all. Fully automatic fire mode makes it an entirely different beast. So different in fact that citizen are not allowed to own fully automatic firearms in nearly all countries that allow gun ownership.
And before anybody accuses me of talking about something I have no idea about, the record, I served in the military (NBC unit) and shot fully automatic rifles, I also do own semi automatic firearms myself. I do have hands on experience with these appliances you speak of, I've been spending 6 hours at the shooting range every week, for 12 years now. (I've never wanted to make love to my guns though, so maybe there is something wrong with me.
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Also about the term military-esque, look at this hunting gun. Definitely no military-esque, right? Looks nothing like anything any military fields nowadays right? Would you believe if I said this gun can exactly do what the AR15 (AR15 = civilan M16 version) can do? Because it can. It can accept 30 round magazines, it is semi automatic and shoots .223.
In fact, semi automatic guns have existed for about a 100 years now, its a design that predates World War 1, so there is nothing military-esque about that feature either.
So, what gives? Is it just that evil look of the AR15 and the AK?
It never ceases to amaze me with how little information people judge things and other people and condemn them. Its frightening, but something very popular nowadays. Guess its the current Zeitgeist.