It's all in the name, this adaptor allows you to install a traditionally threaded regulator on your Dye/Proto gun. The guns already come with one of the best regs out there but in the event it fails your not going to find another to fit until they become more common. Or maybe you just prefer a different type/style (Shocktech is always a nice choice) our adaptor will give you the ability to choose. Always a valuable asset in the land of the free and the home of the brave.