The FN Herstal 1905 Vest Pocket is a belgium-made semi-automatic pistol chambered in .25 ACP, introduced in 1906. Primary use: self_defense, sport. Type: Pistol Action: Semi-Automatic Caliber: .25 ACP Capacity: 7 Year introduced: 1906, Belgium Weight: 25 oz Overall length: 7.4" Status: Discontinued Intended use: self_defense, sport