A remote delivery device, sometimes referred to as a dart, is pushed out of a projector with compressed gas.
According to the PZP spec sheet from the Science and Conservation Center, Pneu-Darts are not pressurized and cannot discharge spontaneously or through incidental contact.
For the dart to discharge, a small weight at the rear of the device must be launched forward (through impact with a target) to fire a small gunpowder cap, which in turn sets off a larger charge, pushing the plunger forward and emptying the dart into the animal.
Thus, the RDD is similar to a rifle cartridge, where a primer ignites the propellant after it is struck by the firing pin, sending the bullet down the barrel.
Don’t worry, it’s safe, humane and relieves the mares of “the burden of pregnancy and raising young,” with benefits accruing to the public-lands ranchers.
RELATED: Putting the Montana Solution Into Practice: Projectors.
Western Horse Watchers Association 