I'm seeing the MUSK model ET with some sort of futuristic theme where the firearm could theoretically be used on Mars in the same way that I see the Cybertruck being a potential Mars vehicle with the cabin pressurization bio defense mode deal. Just as internal combustion is out of the question with his vehicles the MUSK-ET would have to be free of combustion/gun powder so we are getting into space laser territory which would be epic because it would bypass a bunch of the unlawful regulations as you can't enforce a magazine limit on something operating off of a battery and what have you. It'd be sort of like when he tunneled under LA (?) with nothing more than a permit to dig a pit because that sort of thing hasn't been regulated yet. Honestly my favorite part of the firearms industry is watching the way they dance around attempts at regulating things by modifying designs around the garbage legislation. Can't have a detachable mag over x capacity? Oh wait they define detachable as not having to take the gun apart or requires the use of a tool for disassembly .... then someone comes out with a mag release that requires a tool to push it in and someone else comes up with the idea to require the upper receiver to be partially disconnected from the lower receiver in order to release a magazine, both of which can be done in a matter of seconds. Watching the firearm industry adapt is super fun.