M4A1. Uses .222 ammo, should be easy to find. Also nice and compact.
Street sweeper. Semi Auto shotgun goodness.
Surveying staff bottom section. Long, light and sharp. Keeps them at a distance with an eye stab.
Bushmaster. Runs on diesel which should be in good supply on farms ect. Fully sealed has a kitchen and shower can do 110km/h to escape hoards.
Yep have thought about this lol