I still think it's the "scary sneaky" things they'll go after this time. So my recommended purchases if you want them now would be:
Kel-Tec Sub-2000 carbine. It can be carried under a coat at 16" long, or in a laptop bag, and unfolded in less than a second to become a full-sized carbine with 20-30 round mags. It's been called the "budget bodyguard's MP5" as a result, and it's a fine SHTF and hiking stowable weapon. They WILL demonize that one.
Kel-Tec SU-16C, for the same reasons. Any of the models, really. Add the PLR-16 as well, since it's a .223 pistol, and must be a COP KILLER.
Tokarev TT-33. Apparently some cop was shot by a drug dealer with one in 1999, and his vest was nearly compromised. It will be on the "cop killer" list as a result, if there is one.
FN FiveseveN. Same reasons. It's never been used in a crime, and however unlikely it is that a crackhead will buy a $800 pistol to knock over the quicky mart, and despite the fact that civilians CAN NOT BUY the AP ammo, they can make noise about it and call it scary.
Anything that even looks like an Uzi, Mac-10, or other SMG. Any SMG parts kits you want, get'em now, even the old CZ's. They'll claim that you can make a new reciever out of an exhaust pipe and terrorize a school. Or something.
AOWs. Silencers. I don't know of any crimes committed using a silencer on a threaded barrel on a good pistol, but lawmakers watch too many Hollywood movies.