So I reached out to the company that is making the air adapters and they would ship to the states but it would be $30 or so for shipping, on top of the $30 for the product. I wonder if MCS or Rockstar would stock them eventually.
I'm wondering if using that with a tank with an output of 450 to 600 would drop the velocity enough to be usable.
Below is the link in German. https://www.ram-shop24.de/de/hdr50-r...solidcore.html