Ahhh, short for, I'm Anal, it makes sense now. Perfect for lawyers. Or in this case I'm not Anal if you're a non-lawyer. Either way, it works.FQ13
Also of note, last year the ATF made a new updated ruling on "parts kits" and pistol conversions (thanks to T/C Arms).Once a serialized receiver is listed as a rifle, it can only be converted to pistol or SBR with the ATF paperwork and stamp. But, if it starts out as a pistol, then it can be converted to a rifle and back to a pistol as long as the 16" barrel and 26"OAL is followed while a rifle...... and parts for both can be kept.http://www.atf.gov/regulations-rulings/rulings/atf-rulings/atf-ruling-2011-4.pdfhttp://www.atf.gov/firearms/faq/national-firearms-act-short-barreled-rifles-shotguns.html#receiver-sale
The specific regulation change may have been last year, but the original Thompson Center case was a SCOTUS ruling from back in the late 80's when I worked there the first time. (T/C, not SCOTUS, I'm not a lawyer either )