(Used) 28-2 Highway Patrol, 357 mag, 6 shot, 6" barrel. The Smith & Wesson (S&W) Model 28, also known as the Highway Patrolman, is an N-frame revolver chambered for the .357 Magnum cartridge, in production from 1954 to 1986. It is a high quality matte-finished bead blasted version of the S&W Model 27.