Ruger Speed-Six in 9mm with 2.75-inch barrel using moon clips. Rare variant enabling common pistol caliber in the compact Ruger. Type: Revolver Action: Double-Action Revolver Caliber: 9mm Capacity: 6 Year introduced: 1975, USA Weight: 31 oz Overall length: 7.75" Status: Discontinued Intended use: Concealed Carry