Henry Repeating Arms Pump Action, 22WMR, 20.5 Octagon Barrel, Blue Finish, Walnut Stock, Adjustable Sights, 12Rd H003TM The Henry Pump Action Octagon is an all-American icon. Fitted with a blue octagonal barrel, it resurrects the great old days of the traditional shooting gallery. The Henry Pump Action Octagon is available in .22LR or .22 Magnum and is built for fun.