(Palmer Cap-chur Equipment) The Short-Range Cap-Chur Pistol is effective from approximately 5 to 15 yards, depending on the size of syringe used. The Cap-Chur Pistol is designed to allow you to treat or immobilize animals safely in the field or feedlot, saving the time of catching or transporting them. Making use of a unique patented automatic syringe propelled by CO2 gas, you can propel 1 to 20 cc's of vaccine or medication to an animal and have the syringe inject the liquid on contact. CO2 propels the syringe from the gun. Re-usable Cap-Chur Syringes require a Cap-Chur charge inside the syringe to expel the liquid through the needle on impact. After injecting, the syringe stays in for a short time, then falls out for easy recovery. Disposable Cap-Chur Aero Syringes do not require a charge. Comes with practice darts and instructions.