The AK receiver has mag centering dimples on both sides and a detent in the bottom front that need to be pressed in. Using the listed materials here is how to make these jigs. First you will need to drill a .250" hole through each of the .125", .250" and the .750" pieces of steel stock. The hole needs to be .625" in from the end and centered at .500". Two of the .125" parts will now need to have the punch guide slot formed. This is done by drilling 2 .375" holes on the center line. One at 2.1875" from the back and one at 1.8075". Then you can use the Dremel and a file to create the top and bottom flats. I find it is easiest to vise grip the parts together and do them both at once to ensure that they match. The .250" parts will need to have the bottom outside edge beveled to fit into the corner of the receiver.
Now you will need to make the dimple punch. Using some of the .375" x .750" steel stock, Shape it with the file to look like the one below. Be sure to rebate the punch end to compensate for the thickness of the receiver.
When you assemble the jig on the receiver you will place one .250" on one side, the .750" part in the middle, The .125" part without the dimple hole next and one of the .125" parts with the dimple hole last. This is then slid into the receiver, The second .125" part with the dimple hole is then place on the outside and the assembly is bolted together by lining it up on the hammer pin hole.
Lock the assembly in place with a "C" clamp and use the anvil part of the bench vise to form the dimples with a hammer and ram. I use a piece of scrap wood as a wedge to hold the inside parts firm against the receiver.
If you rotate the punch several times for each dimple it will turn out more symmetrical. Once you have done one side reverse the jig and do the other side. Now you will do the front mag well detent using the two .250" parts and the .750" part. Set up the jig with the two .250" parts against the inside walls of the receiver and the .750" part in the middle about .375" in front of the mag well opening. You can use any type of scrap metal as the punch to make this detent. I modified a bolt head to do this on receiver blanks.
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