I am a total newbie to paintball, and I just received my new Kingman
Aggressor XT today...To try it out right away, I got a few 12 gram CO2
cartridges (filled), in addition to an empty 12oz Chromoly...My
question is, what type of an adapter do I need to use the small,
silver 12g cartridges with my Aggressor? Is there a certain name for
it? To a novice like me, those small CO2 cartridges look completely
sealed, and I am curious as to how the gun will open/hold them...

Any help would be greatly appreciated!
Bob