There are at lease 3 version, M60 Super DX, and M60E3 SDX, M60E1SDX. What to look for is the "S" tube if there is any damage. Also look for if there is aftermarket Hop-up like "LRB" installed or not. Asahi M60 is good as they don't need extra magazines, just rack the charging handle and you have around 40 rounds ready to go. The only thing to worry is to use which kind external air source to power that gun. There is lots of info. on the web about Asahi guns as the oversea airsoft players discover those gems. Try
www.classicairsoft.net for informations.
