Calico's helical-feed semi-automatic pistol using a proprietary top-mounted helical drum magazine holding 50 or 100 rounds. The helical magazine design was unusual and provided exceptional capacity in a compact format. Type: Pistol Action: Semi-Automatic Caliber: 9mm Capacity: 50 Year introduced: 1985, USA Weight: 49 oz Overall length: 14" Status: Discontinued Intended use: Collecting, Range