Actually, this is what I've considered for my too-long S12: cut down and thread to the standard 19" length (via gunsmith -- this exceeds my skillz). Since this is longer than 'sawed-off shotgun' length even without brake, I presume that there are no legal issues involved, right? Other than maybre 922r, and I'm taking care of that in other ways. Just want to make sure.
Yeah, yeah: gas ports: I know. :-)