Finally a speed feed with no drawbacks. Heavy duty polycarbonate Spring Fingers reload with ease, spring immediately back into position and keep every ball locked securely inside. The Crown SF is the pinnacle of speedfeed evolution. Instead of a rubber hinge, each Crown SF finger is attached to a feather light spring, allowing it to flex downward with the slightest touch and immediately spring back to the closed position. This allows a perfect feed everytime, with absolutely no paint loss.