The AETA Sniper Rifle is one of the most powerful weapons in the AETA. You can pull the trigger and shoot 8 times before the energy core overheats. When it overheats, the clip launches out onto the ground. 

To shoot, just aim with the scope and pull the trigger. Once pulled, the gun shoots a thin green beam out and there is another beam orbiting the first and when it pearces flesh, the orbiting beam poisons it, and instantly the Deller is dead. It is a violent weapon, but it isn't too messy.