How can this http://www.kel-tec.com/plr16.html be a pistol, while these aren't? http://www.impactguns.com/store/Pre-028384.html http://www.auctionarms.com/search/displ ... um=7924801 http://www.auctionarms.com/search/displ ... um=7941585 Especially that first one, which is also .223 cal. The other two are 12 ga. They don't look all that different to my non-expert eyes. All are two handed "pistols" and semi-auto. They do the same job about equally. So, what's the difference? I've seen "pistols" that look like short barreled rifles and SBRs that look an awful lot like some "pistols". Why does the BATF rule one way on one and the other on another, other than just because they can???