Take it to a shop! if you want to do it yourself the normal way is to put the bottle on scales and fill it from a larger bottle to a fill weight. To be honest though CO2 is well out of date. A smart move would be to move onto compressed air.
If you have a refillable CO2 tank it can be refilled by taking it to your local sporting goods store and asking them to refill it. It should be noted though that not all CO2 tanks can be refilled and so you should first ensure that yours can be.
With a paintball field CO2 filling station, DO NOT ATTEMPT TO DO ON YOUR OWN!! IF YOU DIDN'T KNOW WHERE TO FILL A TANK UP NEVER FILL ON YOUR OWN!!!
Go to a paintball store and pay for them to fill it.
if you're asking how to refill the tank you take it to a local paintball shop or sporting goods store, they can fill them
Sporting goods stores, Paintball fields and some Gas stores.
You take it to a paintball field or sporting goods store and have it filled.
Do not disassemble your CO2 tank. If there is a problem take it to an airsmith.
If it has threads on the top, you refill it like any other tank by taking it to a sporting goods store or paintball field. If it does not, then it is a disposable, and you cannot refill it.
Dicks, any paintball shop, and Gander Mt.
No paintball gun will work without a CO2 tank or other propellant tank. without Co2 there is nothing to push the ball out of the barrel.
Where the air tank or co2 tank normally attaches
There is no such thing as a "CA" tank.
A paintball gun, unlike airsoft or real firearms will have a hopper on top, and will have a co2 tank sticking out of the back.
you need Co2 to fire any paintball gun, it is what physically moves the ball out of the barrel.