The GAU-19/A 12.7mm Gatling gun can be used for a wide range of applications including helicopters, land-based vehicles, surface Navy ships, and high speed patrol boats.

The GAU-19/A is a three-barrel Gatling gun that provides significant firepower superiority to counter both air attacks and a variety of ground based threats including light armored vehicles.

General Dynamics Armament and Technical Systems has developed an armament kit for application of the GAU-19/A on the High Mobility Multipurpose Wheeled Vehicle (HMMWV), or "Hummer".

In this configuration, the GAU-19/A is mounted within a pintle-mount module that interfaces with the Hummer roof-mounted armament ring. The gun is fed by an ammunition container which is mounted to the armament ring. The Hummer 24 Volts Direct Current (VDC) power system is used to drive the system.