I've had two Chinese versions-one a war trophy, and the other a Norinco commercial model. The Norinco is pretty accurate, about 2 MOA....

I installed an M1 Carbine rear sight on top of the recoil spring cover on the military one by contouring the sight base and sweating it on. It required the front sight to be screwed out to the full-up location, but made it a lot easier to shoot well.