FYI, I just saw one of these tonight...on an FAL!
I talked to the gunsmith who had it, who showed me that it would fit on an AK. Apparently it is a Steyr short flash hider type flash hider, and the thread pitch is close enough to 14X1 L that you can thrad the bad boy right on.
He said that he had seen people modify them and even turn them down enough that an AK bayonet would fit over them.
If you check Dsarms you will find the product, and see taht they do have them as U.S. made. you will also note that jungp has them for a much better price than DSArms, so I assume he won't mind me posting this info here.
Jungp, if you would prefer I remove this info, just let me know.