What Do I need to Connect to This Valve?

+1 on best fittings. Shopped there twice and great products!

Ray is absolutely right to warn about the regular tank valve opening too quickly. Filling an airgun requires very controlled flow. This differs from the full on/full off usually desired for breathing air application.

Also, this valve still has too low a pressure range on the gauge.

I would swap it out for someone more appropriate rather than continuing to add on stuff like regulators and adapters to make it work.

Bit the bullet ONCE now. Get a slow flo valve and filling setup. Be happier and safer later.
Being too cheap with HP air is just foolish.

The Vulcan air cylinder fills to 250 bar. (3600 psi)
A 3000 psi rated system won’t fully fill the Vulcan. If you are dealing with dive shops that are unfamiliar with airguns, they may not be used to our higher than SCUBA pressure needs. Some dive shops can’t even fill a tank beyond 3,000 PSI. Even worse, might sell you a tank that is only rated for the 3,000 psi pressures they are used to dealing with. 3000 psi is below “empty” for Vulcan usage.

How foreign might our pressures be? Eyes practically popped out when I said 4500 PSI for my CF tank to a friend who dives and runs a RIX compressor and booster to fill his own dive tanks. For him, 4500 was an insane fill pressure. It’s routine for air gunners. We don’t use a lot of volume, but we use really high pressures.

OP actually should be using a 4500 psi rated tank, valve, and fill system.
The Stickman looks like a neat SCBA fill system.

Don’t mess around with high pressure air. Make certain everything is rated for the high pressures involved.

That looks like an SCBA valve, but I am a bit concerned by how few threads there appear to be on the valve. I think you would need an SCBA to DIN300 adapter. That around $70 and you will still have a fast flow valve rather than a more controllable slow flow. If you connect the Vulcan whip, add QD before its probe you’re already adding another $100 to get this working.

I really don’t want to read like a Brancato advertisement, but personally, i’d bite the bullet now and completely swap out your valve, garage, and fill whip for something that will be easier and more pleasurable to use LONG term. You will spend a little bit more now, but end up with a lot better setup.

TJ3 SLO-FLO Gun Fill DIN300 VALVE and HOSE ASSEMBLY
http://www.airtanksforsale.com/#TJ3_SLO_FLO_Valve

That will get you into a much easier to control flow valve, a very reliable quality micro bore whip, and proper QD on the end of the whip.
For an even more convenient setup, inquire about doing that with a option 2A hose assembly instead of a DIN 300 hose. That will give you male foster QD on the tank and female QD on both ends of the whip.

I’m trying to get you into a better grade valve and connectors that won’t require screwing on/off during filling the tank or gun.
If you end up with a compressor of your own, its output whip will most likely be a female QD.

Then again, you might be using a local fill source and will need your tank fill adapter to fit their equipment.