A few of our friends bought one, and all three guns shot over 420 FPS. They used an Reducer valve (as suggested above), and it worked. I don't know however how low it got. Duster gas is not hard to find at all. It's computer cleaner, and should be able to be acquired from any relatable store. Also, you'll need the duster can adapter. You can order them online, for about $6.00.
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