i have a norinco that im looking to make more tactical, but im looking for a new receiver cover to mount optics on. I did buy one but its complete garbage after several hours of filing and milling i got it to kinda fit but the bolt hits it and the hole that the pin that holds the cover on need to be filled and redrilled so im gonna cut my losses and get a new one. does any one have any suggestions on brand or even where to find one?