We call them sewer roaches in AZ. Because when the city sprays the sewers you house becomes under siege. Fraking roach air force.
12 gage bird shot will take them down. A bofors is a bit much for individuals and too slow a rate of fire for an effective antiaircraft barrage.
I have taken them out of the air with a wakizashi( small katana) very satisfying to see two halves fall from the air.