Do the MC5 comes with a Din value attachment?
No, the package came with a standard yoke attachment, with no din valve adapter. Hoses and attachments includeda: Yoke attachment, primary reg, hose and secondary, hose and high pressure gauge/depth gauge, hose and octopus, BC vest, hex key, and hat
Mine did come with a DIN valve adapter, yes. A small, threaded attachment that fits inside the first stage if you choose to dive DIN.
I am unfamiliar with a din value attachment..
No, it is a yoke valve.