Umarex Gauntlet Leak from bolt area

[attk11]

I am noticing air leaking when shooting from the bolt area. It looks like it might have been leaking for awhile with the amount of lead dust. I saw another post where the guys transfer port gasket was cracked, I'll check this later today. The pellet probe o rings look good and the air definitely feels like it is leaking from the bolt area.

Any other areas I should check?

The gun was shooing at 900 FPS and now it shoots at 664 FPS. I have the tune kit installed but feel like once the air leak is fixed the FPS will go back up.

 

[rafajpg]

Hello, do you have the schematics and part list of the Gen2?, I do have a big leak too and will need parts for sure, thanks

 

[PumaCarl]

Your probe orings might look good but I would change them. Those numbers look like bad bolt probe oring numbers.