Kingman Training introduction video featuring specs and images of the KT Eraser™ and KT Chaser™ 11mm paintball markers. Kingman Training markers use 11mm paintballs (.43 Cal.) powered by a 12 gram CO2 cartridge with a magazine that can hold 9 paintballs and shoots up to 250 feet per second. Each 12 gram CO2 cartridge can shoot up to 80 paintballs.