CLEO Chief Law Enforcement Officer
CAN Silencer/Suppressor
DD Destructive Device
NFA National Firearms Act of 1934
GCA Gun Control Act 1968
AWB Bill Klinton's and the rest of the Democrats Stupidest Idea ever; Assualt Weapons Ban 1994
Preban Firearm or magazine or accessory made prior to Sept. 13, 1994
Postban Firearm or magazine or accessory made after Sept. 13, 1994 to Sept 13, 2004
LL Lightning Link
DIAS Drop-In Auto Sear
SMG Submachine Gun (pistol caliber)
MG Machine Gun (intermediate rifle caliber)
Tech Branch ATF Head Office that interprets firearms regulations
FFL Federal Firearms Licensee (Gun Dealer)
SOT Special Occupations Tax (Gun Dealer that can sell NFA items like machineguns and silencers)
Stamp $200 tax stamp to certify legality
OP Original Post/Author
There are a few off the top of my head that I don't think was covered in the OP. My apologies if I duplicated any.