Not so much a bad idea but one with very limited applications, like squeezing through TSA security guidelines and actual practice, and then wanting to/to be abl

Not so much a bad idea but one with very limited applications, like squeezing through TSA security guidelines and actual practice, and then wanting to/to be able to fire a lot of rounds afterwords. Not ideal in general if for no other reason than more complicated ergonomics. I recently read an interesting observation that the shape and weight of a full sized service pistol got established more than a century ago; that, plus e.g. my observations of how many ill trained people in the US still manage to effectively and responsibly wield handguns in self-defense suggests we've achieved an ergonomic optimum. So radical deviations like your idea are not likely to be good even before we examine details, like how you don't want to limit yourself to only one wrist, it probably decreases the gains from the bracing that can be applied by your other hand, the coupling mechanism is likely to be problematic, slow if nothing else, etc.