Yeah, while pretty much any marker will run on co2, most don't like it very much, and will perform miles better on air, it's definately the best upgrade for almost any gun
Yeah..if you rtalking about CraigPils..he has an Expansion setup on there, and the bottle will have an anti syphon in it...so you should be good...just dot fire it at the ground coz that will draw liquid...and freeze it up...
Yeah mags shoot fine on c02, for some reason the trigger always felt harder when I used co2 but yeah as long as you have expansion chamber or something it should be fine.