Canon C300 Mark III and C500 Mark II Recoil ProThe Canon Recoil Pro is a shoulder rig designed specifically for the Canon C500 Mark II and the Canon C300 Mark III. This is a Next Generation Recoil rig designed for optimal balance and comfort when shoulder mounted or on a tripod. With lenses and cameras being similar weights, the balance point is where the lens meets the camera body. In a shoulder mount rig, the balance point needs to be directly over your shoulder which puts the camera behind you.