What is the diameter of a paintball gun barrel?

Answer 1

The industry standard paintball size is .68 caliber. However, the standard barrel bore is .689. If you are looking for a barrel that will fit the paintball, overbore, because paintballs are sensitive to heat and moisture and they will swell up throughout the day.

Answer 2

very slightly largery then .685 caliber, but high end barrels can be ordered to a specific smaller or larger diameter, usually from .67 to .69.

Answer 3

You want your gun to have as little frontal profile as possible, so you dont want a very wide or tall marker.

Answer 4

One with or without a buttstock?

Answer 5

About .685 of an inch all around.