The Matrix is a moderately overstable GYRO midrange designed from overwhelming demand by loyal MVP disc fans. It is a fast and smooth large-diameter midrange driver with responsive overstable flight for a broad power spectrum. This was the mid-range disc released for the 2016 MVP Circuit. 5/4/-1/2. Proton is a beautiful and durable blend in the MVP line. Like all MVP discs, Proton has two seperate plastics; a transparent flight plate in vivid colors, and a black solid outer rim.