I don't know much about Co2 airsoft pistols but from what I've heard they're not bad. I do know that my Co2 pellet pistols work great in cold weather and I've yet to have a single issue with either of them for the 6 years I've owned them. If you can't find informative comparissons here, may I suggest talking to a retailer who deals in both Co2 and regular gas pistols? They would have an interesting take on them I'm sure ")
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