I've a BPK as a dedicated NV rat gun, mine has had no issues either. The grip creaked slightly when new then stopped doing it. The finish is fine and...
Remove the magazine and push on the valve to make sure you have gas flowing. If the gas flows then you probably have a blocked barrel or the magazine...
Now on the other hand, my Sirocco 2000 has a superb trigger but like you say, I've had numerous other rammers with bad triggers, its a shame because...
Very impressive set up. Not sure I can tell what the insulator blocks are made of. The manufacturers rigs are very complex and take all the vibration...