The BT-4 Rental Paintball Gun has run through every torture test we could think of. That includes passing the most demanding one of all, "The Rental Marker Trial". The BT-4 Rental Paintball Gun is designed to be rugged enough for rental use with standard features that keep maintenance simple and provide maximum value for commercial paintball field owners. Thanks to the clearly visible "Rental" color markings, it's now easier than ever to differentiate between your rental fleet and your customer's paintball personal guns.