Airsoft CYMA VFC AW Custom Glock Gas Blowback GBB Pistol Spring Guide Rod

Description

I have absolutely no idea what kind of spring guide rod this is or what model it comes from. What I CAN tell you though is that it's a full metal construction and looks in very good shape. Probably used judging by the grease and lube present on it. They may be dusty from storage and that dust is seen on the grease.
Length is 139mm,