A mechanism for an open bolt type air gun includes a trigger that is pulled with a bolt in its retracted position. Manufacturing 7-ethynyl-2,4,9-trithiaadamantane includes the steps of: reducing alkyl 2,4,9-trithiaadamantane-7-carboxylate to produce 7-hydroxymethyl-2,4,9-trithiaadamantane; oxidizing 7-hydroxymethyl-2,4,9-trithiaadamantane to produces 7-carbonyl-2,4,9-trithiaadamantane; and reacting 7-carbonyl-2,4,9-trithiaadamantane with Ohira-Bestmann reagent to produces 7-ethynyl-2,4,9-trithiaadamantane. A progress module processes the data to determine an estimated time to complete one or more second sorts of the mailpieces. A damping unit is connected to the shaft so as to provide proper damping force to the body and an adjustment unit is connected to the damping unit to adjust the damping force. Content may be cached at the local distribution node to allow faster service of subsequent requests for this content. The fifth frame and the seventh frame have a pivot protruding from outside surface.