Two piece barrels allow you to change the diameter of the bore, which lets you fit the paintball better, leading to more accuracy.
They are both around the same performance. The J&J may be slightly better, being ceramic.
You don't. A shroud is a piece that goes over the barrel, either for better looks, or so that rails may be added for lasers, hand grips, grenade launchers or other accessories.
A paintball sniper rifle can shoot father.
fusion is much better ions need to be fully upgraded
depends on how you use it
Buy better paint, and get a barrel that fits the paint well. Also clean your gun often.
for each single shot markers themselves are not any more accurate than any other marker, the barrel can help with accuracy and shooting good paint is the easiest way to improve your accuracy. player skill is also a large determining factor, now if you are shooting a string of paint you are going to want a marker that has as little kick as possible so you can hold it as steady as possible, in which case look into a spool valve marker as they have the least kick out of any design
If you meant "why do you need any gas tank for Paintball": the expanding c02 or hpa is what pushes the ball out of the barrel at high speeds and can be used in reseting the gun. If you meant "why you need a C02 tank specifically": you dont need a co2 tank to play paintball. their is compresed air tankes available. most electrical guns must run on air enless you want to be doing maintenance on the gun after every game and replace parts after 5 games. most non electrical guns also can be ran on air but is capable of runing on co2 but air would keep your gun in better condition. You need co2 or compressed air(nitrogen and compressed air are the same thing) so the paintball can fly out of the barrel and to re cock your gun automatically.
Better control of the bore of your barrel can help accuracy and consistency. You will also make your marker more efficient and be able to get more shots out of the same size tank. Typically you find a barrel size based on the size of the paint you shoot most often. Barrel kits come with multiple sizes to allow you to change the size of the bore on a case by case basis.
It was just the same but it got better with improvement
Co2. Buying a Hpa tank for a cybrid is money that should be spent on a better gun.
all paintball guns run on gas. some have electric triggers so they can shoot faster.