The Proto paintball barrels come in two different styles at two different price points. You can choose from either the standard less expensive one piece barrel or the more expensive two piece barrel. The one piece barrel is a very accurate and low cost upgrade for any paintball gun. The Proto one piece barrels are very light weight barrel and are available for all paintball guns on the market.
The Proto two piece barrels come separate as one barrel back and one front. The back part of the barrel screws directly into the gun with the tip threading into the back. This combination gives the paintball a tight fit into the back of the barrel and a loose fit through the front. This gives the two piece Proto barrel some of the best accuracy in paintball.