North American Arms Ranger II, Single Action, Revolver, 22 WMR, 2.5 Full Rib Barrel, Matte Finish, Stainless Steel, Silver, Wood Grips, Fixed Sights, 5 Rounds NAA-22M-R250 The NAA .22 Magnum is the most popular Mini-Revolver ever produced. With the many current accessories, it is versatile for many applications and is the standard by which other Mini-Revolvers are judged.