green gas mags and co2 mags for a GBB handgun
 

For example, I got a GBB handgun with a green gas powered mag, but I want to use a co2 powered mag, can this be possible?

Depends on the brand and model of gun.
Some guns have CO2 mags made for them, others don't.

The guns that take CO2 usually are NOT the same model as the green gas ones. They usually have reinforced internals to handle the extra pressure. While a CO2 gun will work with the green gas mags, you'll more than likely explode your internals and/or break the slide running CO2 in a green gas gun.

I run my green gas KJ M1911A1 with CO2 mags.

No isssues yet, but it could use a stronger recoil spring.

out of a friends mis fortune, do not use a CO2 mag (even if availible for said pistol) with a plastic slide

"Slide-embedded-in-face" syndrome?

Vids or it didnt happen!