Type: Cartridge Color: Black stock, blued assembly Pack Size: 1 *Cycling for Models 196 and 389* Recent field studies have concluded that cartridge-based projectors perform best when given adequate time to cycle. By definition: Cycling implies the ability for the gas chamber, within a cartridge-fired projector, to replenish itself with fresh oxygen. When achieved the projector yields a more consistent burn rate in each charge fired. Failure to do so results in less oxygen yielding lower combustion levels (e.g., reduced muzzle velocities) for subsequent RDD Devices fired at less than 30-second intervals. All of our projectors have adjustable power controls that makes for effective shooting at close range or sizable distance, even from the bird’s eye view of a helicopter. This allows for quiet propulsion and less trauma to the animal when properly applied — a real plus when immobilizing penned animals.