Obviously an air gun. It has a highly compact power source that runs a pump to create a highly compressed gas. This gas is injected into the chamber and instantaneously flashed to produce tremendous pressure. Cooling and heat dispersal systems take care of the heat from compression. No ejection mechanism is required as the gun only needs its special "smart" projectiles. The gun is made more effective through its dynamically adjusted sighting mechanism coupled with computer controls that automatically adjust for local gravity and provide last minute programming to the "smart" projectiles. Old fashioned solid projectiles can be fired when local technological or supply conditions do not allow for their use.

Vera! Yes... You already know my feelings concerning this. :) Hee

Are you sure it's an air gun? Jayne said in "Our Mrs. Reynolds": "Vera needs air around her to fire". That wouldn't seem to apply to such a gun.

i call him *shuai*