Are CO2 Pistols a good choice?

[Baz JJ]

I quite like CO2,and have a WE M92 that takes mags for either (I have one of each). Good for winter use and the fps is under the 350 limit so I can use it at the sites I play.

Are there any CO2 pistols that come stock with good enough components to last it?

Noticed this gun is a dual power one - http://www.taiwangun.com/en/gas-4/dragonfly-dual-power-green-gas-co2-version-aps?from=listing&campaign-id=19

What's the general consensus for CO2? No go?

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