You're missing a point. AR is not military style gun. It just looks like it is.
Now that we cleared that up, if there are guns just as, if not more effective, why gun grabbers are pursuing to ban ARs? Shouldn't they go after those more effective first?
I'm afraid you're missing the point.
My argument is that perhaps the very styling of the gun is what makes it more attractive as a weapon with which to commit a gun massacre.
If other weapons are just as effective in terms of rate of fire and lethality of round trajectory, why aren't those weapons used as often as the military style weapons?
If cultural aspects like video games and movies can bear blame, why not cultural aspects like the style of the weapon itself?
It seems that there are unfortunate people much more interested in protecting guns than protecting the public against lunatic gunmen.