The original NAA Mini Revolver is the smallest commercially produced revolver in the world. Stainless steel construction, hammer-notch cylinder safety, and a 1-inch barrel in .22 LR. Type: Revolver Action: Single-Action Caliber: .22 LR Capacity: 5 Year introduced: 1971, USA Weight: 4 oz Overall length: 3.5" Status: Active Intended use: Backup Gun, Concealed Carry