The Eclipse line of pneumatic launchers feature the industry's most advanced variable velocity system. In contrast to other launchers that use various other techniques to achieve variable velocity, the Eclipse launchers operate at a constant pressure, making more efficient use of their power source. The system allows the operator to adjust the velocity for each individual shot without the need to raise or lower the pressure or to vent gas away from the projectile. Incorporated with a laser or acoustic range finder, the system becomes automated based on range to target. Other variable velocity weapon systems that have used laser range finders have previously been limited by their high cost of operation due to elaborate gas metering or use of gunpowder. With over ten years of development, the Eclipse launchers are the state of the art in variable velocity weapons.