I got into airsoft two years ago. My first gun was a CO2-powered pistol (Pyramyd Air basics), and it felt great at the time. Then I tried Green Gas, and realized there’s more to it than I thought. So here’s my honest take, no fluff.
Green Gas is basically propane with added silicone oil. Its pressure is much lower than CO2 – around 100–120 psi depending on the temperature. If you want a deeper dive into the pressure specs and temperature performance (Evike official guide), that link has all the numbers. CO2, on the other hand, is a beast – an 8g cartridge can push over 800 psi, and the 88g ones are even more aggressive. The upside is obvious: strong recoil, crisp shots, and it works fine in winter – even below freezing. Green Gas? It gets weak when it’s cold. Fine in summer, but in winter it just falls flat.
But more power doesn’t always mean better.
I’ve seen friends jump straight to CO2, and within two months – cracked slides, broken hammer springs, leaky O-rings. The repair costs added up to more than a new gun. This issue is also covered in the Airsoft GI propellant comparison guide, which points out that CO2 puts extra stress on internal parts. Green Gas is much gentler on your gun – it won’t wreck it as fast. Plus, the silicone oil in Green Gas lubricates internals automatically, so you don’t have to mess with extra lube. Some veterans argue that silicone oil attracts dust, though – so it’s a trade‑off.
Cost‑wise, CO2 cartridges are disposable – a few bucks for an 8g, pricier for 88g. Over time, that adds up. Green Gas uses refillable canisters – one bottle lasts a long time, so the per‑shot cost is lower. But CO2 is more convenient – you can grab it at almost any convenience store. Green Gas usually requires a specialty shop or online order.
My verdict: If you want max performance, snappy recoil, or if you play outdoors in winter (Reddit user discussion thread), CO2 is definitely punchier. But you’ll pay with shorter gun life and faster wear – you need to be comfortable with disassembly and repairs. If you prefer low‑maintenance and want your gun to last longer, Green Gas is the smarter choice.
If you have the budget, get an adjustable valve that works with both – then you can switch based on your mood. Otherwise, decide whether you care more about feel, or about your wallet and durability.
Don’t ask me which one I recommend – I keep two guns now: one with CO2 for winter fun, one with Green Gas for everyday plinking. Why choose when you can have both? For the technical background, Wikipedia’s airsoft propellant overview is a good starting point if you’re curious.
