Empire BT4 Delta Upgrade Kit
The Delta Upgrade kit will take your marker from a stock BT-4 and transform it into a complete BT Delta marker, with its authentic sub-machine gun styling. Add the Rip Clip and E-Grip and you'll complete the Delta Elite package. The Kit contains the barrel with shroud, stock, magazine, top shroud and a new clamping elbow. Begin with a standard BT-4 or any of its variants and modify it into the sub-machine gun used by Special Forces around the world. Attain the look of real military hardware with the Delta Upgrade Kit from BT Paintball.