The o-rings are damaged and are not making a perfect seal. Find which ones are leaking, and replace them.
Fifty caliber, but it is more of a toy than a paintball gun.
It depends on the gun, but "both" is an acceptable answer.
It depends whats wrong with it there's a lot of things that could be wrong with it
the ASA (air source adapter)
The sizes 9 oz and all the way up to 20 oz can be used for paintball gun. Some of the paintball guns are supposed to be used by the larger tanks. So the size of tank depends on your paintball gun.
Where the air tank or co2 tank normally attaches
AIM B Style Red Dot Gun Sight-wrong your barrel
On a paintball gun C02, or High pressure air is necessary. It is compressed air that, when the trigger is pulled and the marker fires, propels the paintball out of the barrel.
gauge is broken
Have a degree in chemistry. Do not put anything in your gun besides air-tool lubricant (for mechanical guns), or actual paintball lube.
No, you should use only paintball specific of air tool lubricant.
The purpose of a paintball gun is to fire paintball pellets, to mark opponents in the game of paintball.