So today I set out to determine which is the better propellant to use in Airsoft Gas BlowBack (GBB) rifles and pistols. The two candidates are Green Gas and regular ol' C3H8 Propane. To some of you, the answer is quite simple. To others, you may not be aware. So if you DO know the answer, don't be "Murt the Blurt." Keep it to yourself until I can get through my spiel here. I understand there are other propellants as well, but here in the United States, the standard is one of the two I just mentioned. So we'll stick with those for this discussion.
First off, let's bring everyone up to speed on who the players are in this showdown.
In one corner, we've got Green Gas, weighing in on average at a retail price of $10 per can.
In the other corner stands the challenger, weighing in at about $4 per can.
What is the big difference, you say? Silicone Oil. Yup. That's it. Green Gas IS Propane. Propane IS Green Gas, with the exception that Green Gas has a bit of silicone oil already mixed in with it to help lubricate moving parts and o-ring seals in your guns.
Now, you may notice another difference between the two images above if your situational awareness is dialed in. The green gas has a tiny nozzle that is needed to work with the fill valves that Airsoft GBB magazines use whereas the tanks in the picture do not have any such valve. You will need a Propane Adapter.
Airsoft gas guns and are burning through a ton of a gas, that $5-6 of savings per can will add up very quickly.
You'll thank me in the long run. You're welcome.