HK Army Aluminum 13/3000 Air Tank

The perfect size for a magfed stock! Also saw it has an ISO stamp, didn't know that prior.

HK 13/3000 tank

Haven't used it yet , I like the way it fits in the PE PWR Stock. Wasn't sure how many shots I could get , so I used my 48/4500 tank at Super Game MD . Was carrying 10 mags (20 rounds) .

Leaks from refill fitting

My hpa bottle leaks too much to use. I called Lone Wolf. Repair tech advised me to remove fitting, tape threads with nylon pipe tape and te-install. I did so but fitting still leaks: I think the threads are bad. I was hoping to return it and get a replacement.