Seven-shot stainless L-Frame revolver in .357 Magnum. The Plus designation indicates the extra seventh chamber that S&W achieved by reducing cylinder wall thickness. The 686 Plus is a benchmark service and hunting revolver. Type: Revolver Action: Double-Action Caliber: .357 Magnum Capacity: 7 Year introduced: 1996, USA Weight: 38.5 oz Overall length: 11.4" Status: Active Intended use: Defense, Hunting, Law Enforcement