North American Arms Wasp 22 WMR (22 Mag) 1.63in Stainless Revolver - 5 Rounds - 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. Barrel: 1.63in 5-Shot Capacity Sights: Front Bead Grips: Black Rubber