Smith & Wesson Model 637

The Smith & Wesson Model 65 is a stainless steel, K-frame revolver chambered in .357 Magnum. It was introduced in 1972 as a stainless steel version of the Model 13, which was itself a fixed-sight variant of the Model 19 Combat Magnum. The Model 65 was designed for law enforcement use and featured a heavy barrel and a shrouded ejector rod. The revolver could also fire .38 Special ammunition. The Model 65 was widely adopted by police departments across the United States. Its stainless steel construction made it resistant to corrosion, making it popular for concealed carry and duty use in wet environments.

The Colt King Cobra is a medium-frame .357 Magnum revolver from Colt. Originally produced 1986-1998 and reintroduced in 2019 with modern manufacturing. Features a vent-ribbed barrel and fully adjustable rear sight.

The Smith and Wesson Model 64 is the stainless steel version of the classic Model 10 revolver. It was introduced in 1970 as a corrosion-resistant alternative for law enforcement. The Model 64 fires the .38 Special cartridge from a 6-round cylinder and is built on the K-frame. It is available with either a 4-inch or 2-inch barrel. The Model 64 became one of the most widely used police service revolvers in the United States.