The extreme right or left side of an army or fleet. A horizontal grip generally located on the front of a gun. Used for stability. Continuous firing of paint gun as long as the trigger is held down. Examples are Angel, Shocker, Rainmaker, and TS-1.
Many guns now have kits that can make the gun go full auto.
Every field has its own rules about whether you can bring your own balls or you have to buy their paint. Field fees might be less if it is a FPO system. FPO is most common in tournaments. Abbreviation for 'feet per second'. Every field has its own limit but the maximum is 300fps.