Gunnit Rust: Adding a lower tang to a milled AK

I was at one of my local gun shops a few months ago, and mentioned to a clerk that I kinda wanted an AK, because my SKS had too much x39 to eat all by her lonesome. He had just taken in some AKs in trade that day - a MAK-90 that had sold already and a converted Arsenal SA93. I snagged the Arsenal, and when I took it home realized there was no lower tang holding the stock in place. So it wiggled and waggled. Some research told me that SA93s entered the country with thumbhole stocks, and would need a lower tang added to it, like regular old milled AKs had.

Most websites said that the Bulgarians had either put a block where the tang used to be, if the receivers were milled for a tang, or the receivers were simply not milled for a tang. If the latter, I would be spending hours filing down the rear of the receiver.

Luckily, this wasn't the case. It's faint in this picture, but there's a block in there. You can just barely see the lines differentiating it from the receiver.

My dad's basement is my impromptu gunsmith workshop - it's the same place I hacked apart a FAL rail to become Bubba, destroyer of Woos.

Then I pulled off the pistol grip and went to work. I filed down the rivets so they were flat, and then drilled them out - starting with a small bit and periodically moving up and up, until I had removed all the rivet material.

Now the gap for the tang was clearly visible.

I finished up with putting some new rivets into the tang (which also secured the pistol grip screw hole thing - technical terms are beyond me), and screwed the stock in with wood screws, wood glue, and zip ties. It's really solid now and has no movement.

The finished product:

http://i.imgur.com/g5as6QX.jpg