The Minigun at the tank

At a military base in the desert of conservationists have perfected the "tank" and set it to one of their hangars. Improvement of the "Tank" was that:
1) Is a mega-Durable armor, which is absolutely nothing!
2) on the tank put the Minigun, from which you can shoot.
3) you can lock the door.

Management:
Shoot out the Minigun-RMB (right mouse button);
Rotate the Minigun-mouse Movements as usual;
Lock the door-[.