Please use properly descriptive thread titles from now on.
I assume in this context, your use of "mag" is actually a shorthand for "Magnum".
I'm not sure if you've seen a gas revolver in action before. If you haven't, I recommend searching through Youtube, just in case.
Not all gas revolvers hold only 6 shots. IIRC, TM holds 24 (4x6).
Finally, bear in mind that gas revolvers are significantly inferior to GBBs in terms of both power and accuracy. They're also harder to fix, and AFAIK, less durable regardless of whether TM or HFC made it.
"The Bird of Hermes is My Name, Eating My Wings to Make Me Tame."