Costs more, but well worth it. - UTG Pro SKS Receiver Cover Mount

The extra length provides more mounting options for scopes and protects the scope from ejected cases. It took some patience filing the tabs of the receiver cover and frequent trial fitting. Take down both prongs equally. I used a very good, small hand file with safe edges for the purpose. It fit snugly after I drifted in the locking pin. There seemed to be no need to use the clamping screws on the sides. It is a purposeful looking and well made bit of kit. Get one.