More fun with QB79s ... 12g cartiride adaptor

[pharoah007]

Nice.

Sorry for all the Newb questions....how does one fill these (via the Foster valve) ?

Is there a inexpensive way to get HPA into them? I have seen a hand pump (looks like a bike pump) but it was not cheap.

[Dukemeister]

Nice.

Sorry for all the Newb questions....how does one fill these (via the Foster valve) ?

Is there a inexpensive way to get HPA into them? I have seen a hand pump (looks like a bike pump) but it was not cheap.

Yes, filling is the same as you would bulk fill any QB/AR CO2 gun.
The 88g cylinder is only for CO2, it doesn't work well with HPA because there is no regulator. If you want to run a QB79 on HPA, one economical way is to get a 13 ci 3000 psi HPA tank regulated at 800-850 psi and hook it in directly to the tank block. You need one 2" or less in diameter or else a dropper block is needed for the tank to clear the barrel. Alternatively, a larger HPA tank 48 or 62 ci can be tethered to a paintball ASA-Foster fitting in the QB79. Many paintball ASA-Foster coiled hoses come with all the fittings.

It would be relatively easy to hand pump a 13 ci HPA tank to 3000 psi. It is quite a workout to do a 48 ci tank. But it can be done! (I have done it many times now... saved a whopping $48 in fill fees alone, and have paid for the pump rebuild kit to boot), but my pump(s) are holding up.

On a related note, I have added a BN rubber o-ring between the valve and hammer on all my QBs - it's supposed to work as a debouncer, and save gas. I have found shot to shot consistency is pretty good, but I haven't measured what, if any, decrease in gas consumption there is. Speeds decreased up to 100fps with the O-ring installed, I had to adjust other parameters to maintain non-PAL speed with CO2.