You would first have to see what the State DOJ says about belt fed machine guns for LE before you try that market...
Montana takes the view point that Lethal force is Lethal force.
For precedent, Montana DOC once ordered MTNG to use a field artillery piece to fire on a uprising in the state prison. And... MTNG did, killing several prisoners and ultimately stopping the uprising. The patched hole in the prison wall is visible to this day. That was then and this is now, but MT LE doesn't do a lot of hand wringing over "police militarization".