Gk1 repaired and still won’t take air.

I sent my Gk1 back to New England Air because it wouldn’t take air, last Saturday their tech called me and said the valve had jammed, that it was not user error and it sometimes happens, the pistol was now working great. I received it today, it had no air in it, I tried to fill it with air and it wouldn’t fio. I checked my compressor and it’s fine, I use two differnt fill probes, no success. I contacted John at NEA, he said to take the back off and push the cylinder all the way forward, i did that and it still won’t take air. I do not feel any air coming out of the barrel or anywhere else. Has anyone else had this problem?7
 
rcrawford58, on the rear air tank cap there is a small silver plug. Carefully screw down till just touching then back off CCW 1/16 of an inch. Install tank back and try to refill. There is a small checkdisk underneath plug it may be to tite to allow air into tank. But be carefull to far open and it can hot fill. This disk is meant to control the air vloume flo into the tank.
 
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rcrawford58, on the rear air tank cap there is a small silver plug. Carefully screw down till just touching then back off CCW 1/16 of an inch. Install tank back and try to refill. There is a small checkdisk underneath plug it may be to tite to allow air into tank. But be carefull to far open and it can hot fill. This disk is meant to control the air vloume flo into the tank.
Are you referring to the pistol ?
 
Balloon over barrel won’t work on this pistol as there are slight gaps in between the magazine, barrel, and receiver.

Save yourself the headache and talk to the most knowledgeable Huben repair tech, Kelly (owner of Krazcool Airguns). He’s been working on this platform since 2015 and has encountered every problem imaginable.
 
rcrawford58, on the rear air tank cap there is a small silver plug. Carefully screw down till just touching then back off CCW 1/16 of an inch. Install tank back and try to refill. There is a small checkdisk underneath plug it may be to tite to allow air into tank. But be carefull to far open and it can hot fill. This disk is meant to control the air vloume flo into the tank.
Tried this, still won’t take air.
 
Balloon over barrel won’t work on this pistol as there are slight gaps in between the magazine, barrel, and receiver.

Save yourself the headache and talk to the most knowledgeable Huben repair tech, Kelly (owner of Krazcool Airguns). He’s been working on this platform since 2015 and has encountered every problem imaginable.
I’ve tried everything I know to do and been advised to do, guess I’ll just have to send it in for repairs. I sent it in for this very same issue and it came back with the same issue.
 
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