That will work but their regs are convoluted IMO. I don't see the point of a ASA On/Off when a valved quick disconnect fitting would do the same and would be quicker. I would not spend $100 ++ on an air rig for a CO2 adapter. Look into 13ci Ninja tanks if space is a problem. Mcmastercarr has a ton of parts if you want to build your own rig but Austinwolv on classic airsoft forums offers a very nice dual regulated air rig for $200 pre-built. There is a list of parts in this thread linked below. It should give you what you want plus some. http://www.airsoftsniperforum.com/phpBB/phpBB3/viewtopic.php?t=1791