If the AWB goes away then so should the 50 oz, no handguard, .... etc restrictions on pistols.

With that in mind, how would a person go about building one with regard to the lower receiver? What makes it a 'pistol' receiver? Can you take a regular receiver and use? Or reclassify it somehow?

I've always wanted one even though they are pretty much useless but that never stopped me before!

GL