I need help with a fill adapter and compressor for SCBA bottles.

I need a male adapter for my Omega 9L bottle I bought at AOA. I need it to thread to the regulator assembly and then another male thread to a SCBA compressor can someone help please?

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Not SCBA...SCUBA.. So you will need Standard DIN 300 male to what size your regulator is..
Mine is a DIN300 to 1/4"NPT adatpter...
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To fill from a SCBA compressor.... SCBA to DIN300 adapter
 
Looks like a DIN fitting is called for. Don't understand what you're describing. Are you looking to fill your gun or air tank? When you say "regulator ass'y" are you meaning tank valve? And "male thread to SCBA compressor" do you mean the hose (fill whip)? Hard to assist you when description isn't clear. Try again.
 
I built my own output manifold for my compressor. I drilled and tapped holes in the manifold for over pressure safety valve, pressure sensing switch, a pressure meter and a male foster fitting like the ones found on air gun tanks. This allows me to use the same whip I use to charge my guns to charge my 12 liter bottles. Please note that the air flows in the opposite direction as the foster fitting was intended to do. Most male foster fittings have a check valve internally that will prevent that reverse flow. So, to solve that issue, use a small pin punch and simply knock out the internal plug. In this application, once the bottle is full, you can shut off the bottle valve and bleed down the whip and compressor with the release valve on the fill whip.in the same manner as you do an air gun after filling.