Firstly NOS is Nitrous-Oxide, which is never used for paintball. "nitrogen" is another term for High Pressure Air tanks, because air is primarily Nitrogen. you must buy a HPA tank to use HPA. Not only can you not physically fill the wrong tank with the wrong gas, but It would destroy your burst disk if you tried.
You can not bring Co2 tanks on a air plane. As it could be used as a explosive, so it would be confiscated when you get checked going through the X-Ray.
All Co2/HPA tanks will fit any marker. Co2 cartridges will not.
All Co2 tanks will fit any gun meant to be powered by Co2.
A fill station is a bulk CO2 tank, a fill hose and a scale. They are used by trained air smiths and paintball field employees to refill empty Co2 tanks. First the tanks are purged of all remaining Co2, then carefully refilled and weighed. If you are not trained on how to do this, do not attempt, at the risk of breaking the tanks burst disk or damage to you by the extremely cold gas.
No, they cannot.
The cybrid uses Co2 tanks.
"H" is not a size for CO2 tanks
No co2 tanks are sold full.
They need the small sealed CO2 cartridges, not the screw on tanks. but yes they need Co2 to function.
There are a lot of good sites for co2 tanks. One that I prefer is DicksSportingGoods.com they have a lot to choose from in many different sizes. They also have many other things besides co2 tanks.
Yes they do
HPA -- High Pressure Air. Compressed nitrogen/air that is used to power a paintball gun. HPA tanks are more expensive than CO2 tanks, but HPA is more consistent and does not damage your marker. HPA is an essential for high end electronic guns. CO2 -- Compressed Carbon Dioxide that is used to power a paintball gun. CO2 tanks are much, much cheaper than HPA tanks, but are also more hazardous to use on electronic guns. CO2 has a nasty habit of suddenly turning into a liquid, especially when it is cold outside. When CO2 turns into a liquid it can have negative effects on velocity and accuracy. Also, for this reason, CO2 is dangerous to use on an electric gun because if liquid CO2 gets into the gun's internal parts it can damage the marker's electrical components permanently. In short--HPA tanks are expensive but more consistent, and necessary for expensive electronic guns. CO2 is cheap but can have unpleasant side effects, so it should only be used on lower end guns.