The Magnum Companion is a percussion cap-and-ball version of the Mini Revolver chambered for 22 Magnum-bore balls — slightly larger than the standard 22 LR Companion. Treated as a muzzleloader in most states. Type: Revolver Action: Single-Action Caliber: 22 WMR Capacity: 5 Year introduced: 2000, USA Weight: 4.5 oz Overall length: 3.625" Status: Active Intended use: collecting