This has been a great build tutorial so far! Let's keep it going by adding our own photos of our build progress! Here are some shots of the mandrel and press tools I made to shape my final receivers for the collapsing stock.
This is the internal mandrel test fit into my CETME stub.
And this is the mandrel pressed into the welded receiver and showing the external dies all in my shop press.
I did unfortunately cut the slots for the rails .015 too deep on each side and had to run brass shim stock inside each cut out, but so far, it is working great!
Not shown is an external die that fits in my bench vice. It fits the shape on the outside of the receiver between the cocking tube and the main body, about where a Stanang scope mount claw would grab. This shapes the whole receiver for the bolt.
The bolt drops through the receiver with no effort.