Rear Stock

This is my work to make an AK-100 folding stock rear hinge block from scratch.

The real thing... 

Cutting

I started with 2" x 1/8" bar stock from HD and traced the pattern directly from the hinge... I plan to make a paste-on template later.  Note how I aligned the squared edge of the steel to the rear of the hinge block:

Ready to make clones:         

Welding

What you're looking at is the setup to weld a plate of 1" wide stock (again from HD) perpendicular to the sides, which provides the rear section.

I started with 1" square piece of stock (the rusty piece) that I'm using for alignment purposes.  That gives me a parallel surface between the sides.  The squared end gives me the 2nd edge to true. 

Underneath is 3 - 1/8" parallels.  I could just as easily have cut some 3/8" stock to shim.  The parallel shims are there only to raise the 1" workpiece to the correct position:

The rear piece is tack welded into position.  The trunion on the left is the real thing to compare the surfaces.

Welded.  I'm using my HF $100 MIG welder.  It does an "OK" job for something this small.  I may try silver soldering a different one together, as silver solder should hold this quite nicely.  This sucker got red-hot so I'm going to let it cool off some before I continue  :) 

Now to add the top section. 

I made the center piece too high, so I milled it down for the top section, which is 1.125" high

I had some scrap laying around and took out the corner so it will be millable into both the top section and the top hinge:

Welded, and cooling.  I also found some scrap to use for the bottom section that holds the buttstock in place.  I welded generous beads as I am going to mill this down to shape.