|  The Power Pack Plus for Pumpers features a: 
        high performance aluminum valve (with an enlarged chamber to supply 
        more air per shot)stronger, high performance hammer spring (part 1 of the
        Pumper's Pack)enlarged exhaust port (part 2 of the
        Pumper's Pack) The trio has been available for years for the CO2 guns, but now pumper 
      fans can enjoy all three performance components, too! Notes: 
        The PPPP kit, as I call it, will NOT work with the first generation 
        1322/1377 (those having a rear cocking knob on the very back). If you 
        have that era gun, ONLY the power valve will work, which is available 
        separately below.  If you have a 1377/1322 that came with a plastic breech (and no rear 
        cocking knob) then the trio will work, though you can still buy just the 
        valve if you want.If you have a P1377/P1322, then the trio will work or you can buy 
        just the valve.The valves are generally safe up to 20 pumps. Enjoy that extra 
        velocity boost, if you want to take the time to pump that much.   
             Basic Kit is the Power Valve, Power Spring & 
      Power Bushing
 
      
           These are just reference photos, but the Deluxe Kit also includes the 
      solid aluminum piston.
 It's the
Power Valve, Power Spring, Power Bushing & Solid Aluminum Piston.
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