What s in the Box North American Arms 22 Magnum Mini-Revolver (1) 22LR Cylinder (1) 22 Magnum Cylinder Padlock Owner s Manual As with every NAA Mini-Revolver, the hammer need not rest on an empty chamber. Using the original half-way notch cylinder, the hammer may rest safely and securely without chance of accidental discharge. The North American Arms .22 Magnum can be used with all popular .22 Magnum ammunition, including .22 Magnum shot shells (called Snake Shot by some manufacturers). 22 Magnum Mini-Revolver 1 1/8 inch Barrel LR Conversion Cylinder 5-Shot Capacity Firearm Specifications Part Number: Part Number: NAA-22MSC Caliber: 22 Magnum with .22LR Conversion Cylinder Capacity: 5 Barrel Length: 1 1/8 in. Overall Length: 4 3/4 in. Overall Height: 2 7/8 in. Width: 7/8 in. Weight Unloaded: 5.9 oz