Gun Control & RKBA

Which would include handguns, of which pistols are a subset.

Regardless, does your own example not tell you that the law in CT is actually an abysmal failure? "Assault weapons" continue to be owned by the 90% of those who have not complied. Also, there are other firearms available that are functionally similar, yet are different just slightly enough to not be swept up under the ban. BTW, that's one reason (among many) why the federal 1994 ban was such a joke, and also useless.

Yes, your category is much more comprehensive: semi-autos that accept detachable magazines. That can be handguns, rifles, or shotguns. It's also why it would be much more likely to be struck down as unconstitutional under the 2nd, as it would be affecting a broad range of firearms. "Assault weapon" bans are more likely to be attacked by being unconstiutionally vague, not necessarily under 2nd amendment grounds, though it can encompass that line of questioning.

Anyhoo, I doubt you'll get much traction on banning all detachable mag semi-autos. I'd wish you luck, but, well...