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DP G5: Leak Down Barrel

If your marker has an air leak down the barrel. Check the items below. ​Reference the manual as needed. 

Bolt Position Test:
  • With your marker off and degassed (no air source attached), move the bolt to the forward position then air it up.  If this doesn't fix the issue, move on the next step.

  • The leak down the barrel may be from the marker body o-ring, located just behind the feedneck. With the marker off but aired up, place your finger through the feedneck and place it over the face of the bolt, which should seal the face of the bolt. If you can feel air pressure building up behind your finger, try changing the small back cap (stem) o-ring. If pressure does not build up and you feel air around the outside of the bolt, try changing the breach/body o-rings. 

    • #3 - Breach o-ring (large): 19mm ID x 2mm CS

    • #2 - Breach o-ring (small): 17.7mm ID x 1.78 CS

    • #10 - Back Cap Stem o-ring (small): 13mm ID x 2mm CS

Bolt Pressure Test:
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