Cowboy action shooting (CAS, also known as western action shooting, single action shooting, Cowboy 3 Gun, Western 3-gun) is a competitive shooting sport that originated in Southern California in the early 1980s, at the Raahauge Shooting Range in Norco, California. Cowboy action shooting is now practiced in many places with several sanctioning organizations including the Single Action Shooting Society (SASS), Western Action Shootists Association (WASA), and National Congress of Old West Shooters (NCOWS), Single Action Shooting Australia (SASA), Western 3-Gun as well as others in the U.S. and other countries. - Source: Wikipedia
