G&G Combat Machine cal 6mm AEG

My brother used to play a bit of airsoft, but he had to move out of the country, so now I'm stuck with these. I do not know anything about the gear other than these pictures, though I am pretty firm on the price. As-is, I can provide more details or photos upon request. I'm also purely guessing for the exact model - Do tell if it is not what it is or if I missed anything.

Please check on my account for more stuff. I'm located in Toronto but I can meet in the GTA area. In person meet up is preferred but I am willing to ship.