Is it some kind of Thompson variant?

Yes, I admit I've never seen it. I fail. :(

Hint: .45 and 9 mm carbine intended for civilian and police use.

Eagle Arms Eagle carbine?
Uses Grease Gun magazines?

EDIT: You can buy one on Gun Broker if ya want. http://www.gunbroker.com/Auction/Vie...=157411980#PIC

Nice carbine, but it´s another gun.

can we get the country or would that be too much?

No problem. Made in the Usa, in the 70´s.

Fox Wasp Carbine?

Well done :D. You´re next.

Well, you'll probably guess this in less time than it took for me to pick it.

http://www.imfdb.org/forum/attachmen...1&d=1266468411

I've seen them before but not from that angle. it's a double barreled revolver. You can just make out the twin cylenders where it feeds more than the usual number of revolver shots.