I used the Ace AR/AK adapter. There was a bit of dremel work involved just to get the adapter to seat properly on the rifle. I think the Yugos might be different from other AKMs. Once I got that to fit then I had to file the fin down a little bit at a time so it fit under the stock with little to no gap. It took me about 3 hours total....Maybe 2 1/2, my wife made me come in for dinner.
It's a great feeling dropping that 30 rounder.