Has it been established that this was indeed a fully automatic weapon? Typically, Uzi's in the US are semi-automatic. Full automatic weapons are highly regulated in the US. You can own them, but you have to have special permits, a lot of hassles, pay fees, etc. Fully automatic weapons are pretty rare in the hands of law-abiding citizens.

UPDATE: OK, strike that. It was specifically a machine gun shoot. It probably was full auto.

Sigh. Now the anti-gun crowd will want to seize on this and ...