FX FX King Bottle Upgrade

Hello, I'm pretty new to this PCP airgun stuff. I'd like to put a larger bottle on my King, Talon Tunes has a 700cc bottle that I think would fit?

It says it will fit FX airguns, but are the internal valve threads the same? Could I buy the Talon bottle without the valve and put my bottle's valve in it?

This is the bottle I'd like to try
 
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