OK here's another one. I noticed my SKS "Paratrooper
had no serial number on the Bolt Carrier in the usual place. SOO I measured the height at the stripper clip guide. Wallah it is 0.030 thinner than my other 20 inch SKS. A Samson Indutries AK 47 Picatinney rail will fit right on this model with none of my earlier posts mods being necessary. Just trying to assist you guys with 20/40 vision or worse.