I got my second norinco yesterday. BTW, this is a used one. While I was cleaning and stripping it last night I saw some differences between this one and my first one. This one has an extended ejector. And also, the lanyard loop in the mainspring housing is missing ( Arched type). The serial number is 528xxx for this one. The first one serial number is 422xxx. I would appreciate it very much for some light on these differences from other forum members. Thank you.