To optimize accuracy, Henry Scope Mounts are available for all Henry H004 series Golden Boy, H006 series Big Boy and H005 Mini Bolt models. Each of these rifles now come drilled and tapped for easy scope mount installation. Our H001 series lever action rifles do not require use of these mounts as the receivers have a 3/8th inch groove to accommodate scope rings. The Golden Boy and 1st generation Big Boy rifles are drilled and tapped under the rear sight.