Have you guys seen the Tailhook pistol brace? I don't really understand what makes it different than a stock (besides a few technicalities), but it seems to function just like one... Can we just get rid of the stupid SBR rules already?
http://www.thefirearmblog.com/blog/2017/01/01/tailhook-pistol-brace-adjustable-lop-folding/