from what i understand attaching a stock or a foregrip or both without first adding a 16"+ barrel turns a pistol into a sbr. so if you dont have the proper tax stamp you would be in violation.
it doesnt matter if its permanent. i could non-permanant attach a 10" ar15 upper to my AR15 and it would be a sbr and in violation if i got caught doing it.
stay away from things that violate or run the ragged edge of nfa law
"Gun control: The theory that a woman found dead in an alley, raped and strangled with her panty hose, is somehow morally superior to a woman explaining to police how her attacker got that fatal bullet wound." — L. Neil Smith
Last edited by JonM; 12-04-2011 at 03:08 AM.