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Smith Wesson 78G
Service, Parts,  Rebuilding



 Rebuild Service $35.00
Shipping $8.95
Total $43.95


  Rebuilding Kit


When we rebuild the Smith and Wesson 78G we rebuild to stock specks. The average Smith And Wesson 78 G shoots around 400 FPS depending on the weight of the pellet used. For all our testing we use Crosman Premier 14.3g Pellets
This is the 5 shot string we get with the stock rebuild of the S&W 78G

 390.6 - 390.9 - 393.6 - 392.0 - 392

This is a nice flat string that will allow the shooter to target and hit consistently.


When Rebuilding the Smith And Wesson 78G, This little puppy needs to be taken out and cleaned. This is what saves your valve and seals from small bits of Co2 Ice and debris.
without it you will end up loosing all your gas.

Most of the time they are in good usable condition, if not they must be replaced.

This is two reasons the Smith And Wesson Valve Fails.

The material was not made to stand up the
oil being used. It looks like the seal was
softened and the pressure blew bits of O-ring away then the valve stem seal through the years
dried and crystallized.

Below is the Smith And Wesson Valve,
Cleaned Polished with New Seals Installed,
 Ready to Assemble and Install


This little port should be removed with care
using fingers or a magnet and a little wiggle
will do the trick.

This is the Smith And Wesson 78G Piercing Cap
assembly, it is of such good quality I wish it would fit other model guns.


Modifications can be made to the Smith & Wesson 78G that will get the pistol
to shoot in the 450 to 475 range. in doing modifications the S&W 78g will loose
shot count per cartridge. Before modifying the 78G I advise trying a lighter pellet.

In today's market their are dozens of quality pellets available and using a quality lighter
pellet to increase the FPS the shot count will remain high and it is possible the accuracy
will increase with the FPS.







Rebuild Service  Includes

For the 79G we do a complete disassemble, soak in a non petroleum water soluble cleaner, rinse wipe and blow dry,
we polish the barrel, extension sleeve and valve body. We replace all seals including the valve stem seal.

We then disassemble the Piercing Body clean and replace the  piercing body O-Ring, if there are any signs of rust we clean
to remove the rust and polish then re-blue the metal parts polish again and oil.

After all has been cleaned and seals have been replaced we assemble with a light oiling on all moving parts and seals. we then perform a pressure test
(3 days minimum) if the 78G passes we insert a Co2 cartridge and perform  a chronograph test print the results pack and ship the 78G back to you.

If you have any questions please feel free to contact our gunsmith.




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