The gun is made by WE (a company from Taiwan) it's model Hi Capa 5.1 Government Model Custom Model-2 It's all metal by the way and when it fires it actually has a pretty decent sound and action.
The company makes several variations of the gun, and some of them are pretty out there, like the "dragon" model.
I bought the gun from an ebay seller who is one of the biggest dealers on the site. If you PM me I will email you details, as I don't want to go that direction. He sells the gun for less than these folks.
Also, if you check around on the web site you will see MANY companies make Glock's, and some of them air gas powered blowbacks, and some of them are pretty cool customs.
According to this website, TM still makes this glock. 4th row down you will see it. Costs $111