For those answering just yes or no, ignore them. It depends on where you live. States (and even some smaller municipalities) regulate the sale and/or possession of automatic weapons. Here in Washington you can't, in Oregon you can (some exemptions for collectors, points of transfer, etc). Check with local law enforcement.
Of course, you can always just buy a semi-auto version of just about everything. I'm sure you're an honest enough law abiding citizen not to spend the extra $200 for a full-auto conversion kit, available nearly everywhere. That is, if you don't mind being in possession of an illegal weapon.