A good paintball barrel will make or break the accuracy of your paintball gun. Our huge selection of paintball barrels offers you the variety you need so you can get just the right barrel for your budget. Choose today from our selection of one piece single barrels, two piece dual bore barrels or complete paintball barrel kits. Paintball barrels come in a variety of inner bore sizes and lengths. The most recommended length for an upgraded paintball barrel is about 14 inches. A lot of aftermarket paintball barrels will also give you the option of choosing the inner bore size. If you are unsure as to what bore size to choose, it is recommend to order between .685 to .689. diameter.