I have longed for a legal and reasonable way to have a compact carbine for some time -- it tickles my fancy more than select-fire or suppressors ever has. That being said, I've paid relatively scant attention to the pistol brace concept over the past several years, figuring it for a cross between the bump-fire stock silliness and a great way to get one's self arrested on a federal crime (not for the specifics of how they work, more the general sense of how firearms fads tend to play out).
But they haven't really gone away, and I haven't been hearing about arrests -- so is it a real thing? Legal? Would anyone be willing to point me toward the thread or resource which has the scoop? Thanks!