Helping to improve overall feel and responsiveness is the Minimus 600 carbon fiber, similar to the 1200 version in the top of the line QR Edge, but focuses a bit more on durability. 

Aside from the Edge Taper, the QRE4 uses the new True1 Phantom One-Piece construction that co-molds the shaft and blade together lower than the previous QRL Line. This significantly improves the shot efficiency and effectiveness since the final product is much more consistent and streamlined than in the past.