The North American Arms Mini-Revolver in .22 LR is one of the smallest and lightest functional revolvers ever manufactured. Weighing just 4 oz, it fits in a pocket or on a keychain while providing genuine firearm capability. Type: Revolver Action: Single-Action Caliber: .22 LR Capacity: 5 Year introduced: 1975, USA Weight: 4 oz Overall length: 3.75" Status: Active Intended use: Deep Concealment