Very rare Russian Zenitco AK-47 full length rail system. Used especially by Spetznaz for their AK-47 and AK-74s this mounting system prevents heat transfer from the gas system to your sight mounted on the rail. The rails system is also designed to allow co witness with the iron sights with certain red dots. The rail system can fit any regularly produced AK as well as modified with light filing to fit chinese, Yougo, and rpk variants. It has not been mounted on a gun so condition is 9.8/10 because I did not get the original packaging. These rail system can be any where from $350-$400 if you can even find them in the states. I will have to add extra shipping to any international purchases.