The Semmerling LM4 is a manually operated single-stack repeating pistol using a slide that is pushed forward by hand to cycle the action. Four-shot capacity in 45 ACP in a package smaller than most single-shots. Type: Pistol Action: Manual-Repeating Caliber: 45 ACP Capacity: 4 Year introduced: 1983, USA Weight: 24 oz Overall length: 5.2" Status: Discontinued Intended use: concealed carry, law enforcement backup