This is a VX-400 machine gun.

The VX-400 is the fourth generation of the VX-400. The VX-400 is the fourth generation of the VX-400. The VX-400 is the fourth generation of the VX-400. The VX-400 is the fourth generation of the VX-400. The VX-400 is the fourth generation of the VX-400. The VX-400 is the fourth generation of the VX-400. The VX-400 is the fourth generation of the VX-400. The VX-400 is the fifth generation of the VX-400. The VX-400 is the fourth generation of the VX-400. The VX-400 is the fifth generation of the VX-400.