Lawmen! Sworn to catch criminals, patrol factory perimeters, eat donuts and deal with the good ‘ole boys having a bar brawl. Each pack of 4 lawmen have headless bodies, and 4 of each head (12 heads in all!):
Security Guard caps, US Cop peaked hats and wide brim Sheriff hats.
Make them up as whatever kind of lawmen you like, armed how you fancy!