Hicapa mag not filling

[naminator]

So I have been rebuilding my Hicapa mags. First mag goes back together and I go to gas the gun up. It takes the tiniest burst of gas then jusst stops filling.

I vented the gas out and it may have been 1-2 shots at most. I can't seem to figure out what is wrong with the fill valve.

[Rusty Lugnuts]

propane tank empty?

[naminator]

Brand new tank.

[Styrak]

Filling upside down? Bad tank or adaptor? Have any others tanks to try?
What kind of mags?

[N_Force]

Remove the intake value, disassembled it, check both tiny o-ring and spring, lube if needed. Reassembled it, before put it back to mag, test it, place propane tank adaptor side up, insert intake valve on top, press it down see if the intake valve vent gas on the other end. If good then put the valve back to mag and test.

[naminator]

Tank is good. Same tank filled mags yesterday. The adapter is good too. They are hicapa mags. Yes i did fill them correctly. I will try pulling apart the valves.