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You saw it here first!  Another Alchemy AirWerks Exclusive (until the copy cats do their thing) Innovative Part

NEW Custom High Performance PUMPER POWER COMBO

 RP VALVE ASSEMBLY AND BRASS PISTON WITH CUP 

Plug & Play for Crosman Pumper 

Models 1322 1377 PC77 2289 BackPacker 

NOTE: CROSMAN HAS MODIFIFIED THESE VALVE BODIES TO ELIMINATE THE THREADED HOLE (AND NEED FOR ALIGNMENT OF THE TWO HALVES). I INCLUDE MY SELF-TAPPING SS SCREW THAT WILL ATTACH THE FRONT GRIP FRAME TO THE TUBE TO MAKE IT ALL WORK PERFECTLY ON YOUR 1322, 1377, DRIFTER, BUGOUT, BACKPACKER. PROBLEM SOLVED! 


  • FINALLY we have combined the Pump RP Valve and the Cupped Brass Piston into a combo listing. 
  • Our BOSS RP CO2 valve has been a huge success and all feedback continues to be very positive.
  • Now we are offering somewhat the same improvements with the RP for pump models.
  • It has been angle ported on the exhaust transfer end of the valve... and has an increase in valve body displacement.
  • What is this designed to do?  It flows better from the valve.  It also allows you to pump more volume of pressure into the valve.  Both of these incrementally improve your fps.  Oh... and it costs less.
  • Modders know that getting a little more from each mod can really add up.  This valve adds.
  • Yes, I recommend this set over the nice flat top versions we make. Why? The valves have the same power but this cupped piston outlasts the flat top.
  • Put a stronger hammer spring, an extended probe, a longer barrel, etc. and the impact of these cumulative mods can really add up. Most reports are an additional 100+ fps at 20 pumps.
  • Pump to ten or less for stock performance... unless you need extra power. When you do need the extra power and /or distance, then pump to 20 or so.  
  • This Custom Modified Crosman part is freshly new (not old stock) and has never been used or installed.  
  • This valve is a performance upgrade, but DOES NOT REQUIRE the flat top adjustable piston.  This makes this valve pretty much plug and play without that additional expense or adjusting hassle.
  • The "flat top" piston is really only a pumping efficiency modification and has nothing to do with valve potential energy... only maybe one less pump after thirty!  So this valve gives you the same greater potential as a flat top, but your pumping efficiency is unchanged (so you will pump past ten pumps for your maximum power). 
  • Most customers report that their sweet spot (number of pumps before the valve retains pressure after a shot) is in the 20 to 22 pumps range.
  • It has only been modified as described above.
  • It is a complete valve assembly and does include all of the internal parts plus the external o-ring. 
  • This part is completely ready for you to install to your air gun and have some fun !

With every order, I will ship same day or next business day. 

and your order will have a tracking number as well.

Feel free to email me any questions you may have.

Please bid confidently. 

Excellent customer service has always been my most important goal.  

My feedback backs that up (and will continue to).

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This is an Approved Item for sale per eBay Policy: 


*** PLEASE DO NOT REMOVE THIS LISTING ***

 

This Item is for Air Gun Use Only... Not for Firearms

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