The UNITEC Combo Kit includes everything you need to get started with a UNITEC Barrel. it includes a barrel back adn a barrel front of your choosing.
 
The UNITEC Barrel front is one of the lighest barrels on the market. it not only add style to your marker but also allows you to size your paintballs correctly to give your self the ebst accuracy in game. 
 
The barrels come in different bore sizes and verious colours/lengths. This allows you to change the style of your marker and length of your barrel, while adjusting the bore size of the barrel.