Building a Short Barrel Shotgun (SBS), Short Barrel Rifle (SBR) or Any Other Weapon (AOW) is perfectly legal.
You just have to know the regs and fill out the paperwork, be patient and pay the proper tax.
You can also build one yourself, assuming you live in a state that allows them.
I didn't bother to click any of the links.
EDIT: I read the link above at Shotgunworld. Perfectly described in that post. I have not built a SBS but I have built a 11 1/2" barreled AR15 SBR.
Last edited by Utah Shotgunner; 01/08/10 01:22 AM.