The MK19 Grenade Machine Gun can defend against hovering rotary-wing aircraft, destroy lightly armored vehicles, fire on suspected enemy positions, and provide high-volume fire into an engagement ...

50 Caliber Machine ... gun is has a back plate with spade grips, trigger, and bolt latch release. This gun may be mounted on ground mounts and most vehicles as an anti-personnel and anti-aircraft ...

The aircraft could be shot up and remain ... A radio operator, located behind the turret, also operated one machine gun that fired upwards. The underside of the B-17 was equipped with a Sperry ...