No. Though some of the components are of the same general design, every company has very different valve and striker designs. Only similar models by the same company have interchangeable parts usually.
Not at all compared to actual paintball guns.
sorry i do not know
Yes, all brand paintball guns use a tank or other source of pressure.
All paintball guns, excluding high end guns, have a .685 bored barrel.
Regular .68 caliber paintballs, all standard guns do. Also there is no "m16 paintball gun" , only guns that look like it.
.68. Almost all guns are this caliber.
Yes. A paintball gun is not considered a firearm therefore a felon can purchase a paintball gun in Texas.
all paintball guns run on gas. some have electric triggers so they can shoot faster.
On most if not all paintball guns you would have to pull the trigger with the safety off.
No, all paintball hoppers have a standard neck size.
Mostly all of them.
At most sporting goods stores, almost all paintball fields, and all paintball pro shops and Army-Navy's. You can also get them online.