As I understand it as long as you're on duty and clocked in your use of a machine gun is assumed to be official, and if you like pursue a car into the neighboring state with it racked in your patrol car that is perfectly fine. If Department policy says you take it home at night then that is authorized use. Remember many of the AR-15 patrol rifles ordinary cops are carrying in their cars were actually M16 rifles the military was giving out for free as part of it's law enforcement assistance plan. Along with armored vehicles and such. Many departments didn't want their regular officers running around with machine guns so they would replace the full auto selector with a semi-auto one and get rid of the full auto function. However they still remain machine guns on paper.
If however you are traveling out of state for training or whatever while off duty, unless you have a statement on agency letterhead saying you are going for official training as part of your duties submitted to ATF your travel form for the particular machine gun will not be approved.
If however you are traveling out of state for training or whatever while off duty, unless you have a statement on agency letterhead saying you are going for official training as part of your duties submitted to ATF your travel form for the particular machine gun will not be approved.


