I remember once, when the Angel was first launched, it said on the box "works with Air only' because it was the first gun that would not take C02 at all.
I had an angry mom approach me at an event, telling me her sons gun was broken...
When she handed the gun over it did not have a tank. I asked where the tank was, she said that she didn't need one, as it works on 'air only'.
She said that she even pointed the microline hose 'into the wind' but it still didn't work. Was she meant to blow into the hose - "because that seems stupid.."