Smith & Wesson Model 18

The Smith & Wesson Model 18 is a 4-inch barreled, double action revolver, with adjustable open sights, chambered for the .22 long rifle. It holds six cartridges in its cylinder and is essentially a .22 caliber version of the Model 15 "K-38 Combat Masterpiece" revolver. It was popular as a training weapon for law enforcement officials and others who carried .38 Special and larger caliber revolvers because the Model 18 operates and handles in a similar fashion, but uses low-recoiling and inexpensive .22 rimfire ammunition.