I picture a lot of things being made less illegal. Transhumanity doesn't have as strong taboos against sex, drugs, and rock-and-roll as modern day humanity, largely due to the whole "immortality" thing. Things that are controlled are limited to things that might cause mass destruction, which includes mil-spec weapons that aren't limited (you might be able to get a smartlinked handgun, for instance, but good luck buying a sniper rifle to hunt all the Martian wildlife what doesn't exist). This includes threats to hypercorp influence, so things like netwar technology, TITAN relics, and such, as well as digital and biological pathogens (and certainly any nano-scale analogues). IP control is where a lot of stuff comes in, as well. There's probably less of a firearms regulation and more of a firearms drought. It's not like people hunt on Mars, and there's certainly no second amendment. What exists is intended for self-defense or "military surplus", and there ain't standing armies either. In the PC, this is accomplished by making knock-offs and pirate copies illegal; you can print that autonomist gun, but that doesn't mean that it'll be easy-you have to go on the Pirate Party Bay (which you'll need seven proxies for), get the blueprints, convince the fabber to let you print them (of course, the restrictions are only for "child safety"), then finally make the gun. Legitimate copies of things that are "illegal" may not be outright banned, but they're just not sold. If you want to incorporate it, you might have things like certificates of authenticity, which are "we didn't technically ban it" permits, with anything that's not linked to one being highly suspect. Fabbers work like 3D printers IRL; they're not necessarily rare, but you don't see a bunch of people owning them. Nanofabrication in particular is something that's not fully accessible; you can use smart materials and macro-scale 3D printing processes to get almost anything, sans complex electronics that aren't purpose-designed for that. Or, basically, the sort of stuff that's in any covert operations tool or weapon in EP. Covert operations equipment is probably more heavily regulated than weapons. Getting shot means you resleeve (at worst), or go into a healing vat for a bit. Shooting someone is still a serious crime, but it's more of a "emotional damages, lost work time, and the fact that you shot someone" rather than "holy crap you could've killed someone". Depending on the nature of how you got it, you could be considered a saboteur or spy for having covert operations equipment, netwar stuff, or the like. For a standard citizen in low clearance, this probably just means being put on a watch list. For a high-clearance civilian or a security operative, you'd better have a darn good reason for downloading/printing/buying it. Ironically, the fact that there's ubiquitous public surveillance means that a lot of borderline problematic things are less sketchy; nobody bats an eye twice at someone walking around with a crowbar in the downtown district at night, because the second they hit someone or break into a structure the law's already been called. In most cases, PC law exists to benefit hypercorps. Individual citizens are protected, but you have freedom because of how unimportant you are; rising to a higher social position means more scrutiny, though you perhaps enjoy further rights because of your status (for instance, nobody looks twice at a celebrity with armed bodyguards).