So if I read this thread correctly an 07 gets you nothing with respect to the MA AWB (to include any gun/mag restrictions that might be coming down the pike), you'd need a MA Dealer's License for that. A MA DL is appreciably more difficult and expensive to get and maintain, but not impossible if you have a legitimate business of some kind.
Sorry if I've missed it in the thread, but what might be the minimum type and volume of gun related business that could qualify you for a DL? And is the issuance of the DL subject to the local chief's blessing, or are you generally good to go if you have the appropriate commercial space (in Littleton, for example)?