This is a handy picture, which shows the various parts of a handgun (a revolver in this case) with the names of each part. This is definitely helpful for people who like to go to online forums or to local gunsmiths with firearms parts questions.
While John Wayne used many Colts in his movies. One of his personal guns, Wayne gave the Colt to Gary Hess who worked for his gas and oil exploration company, DECO. The maker of the Duke's holster rig remains a mystery.