Pete, a friend of Gun Lab, was at the last Knob Creek show and picked up a PE-57 kit and repair section. He was nice enough to send me some pictures of the repair part and I thought I would add a few pictures of my AMT rifle to give you a comparison.
The first thing I have to say is that I am not beating up on the guy that made this repair section. This receiver is very complex and if made with the correct steel would be very difficult to press. With out having a progress stamping set up I think he did a descent job.
I also did not have the repair section here to measure.
the ejection port still needs to be cut out and formed
His bend looks a little rough.
Everything seems to match up when pressed together
The most glaring issue I see is the caming surface.
On the original weapon it is a clean and precise bend.
This one looks to have a not so clean surface and a dimple in it.
Who ever made this put a great deal of work into it. It does need a re-press to clean it up.
I would like to hear from people that have used this repair section to build up a rifle.
This solid model shows the changes that we have made.
Pins to maintain alignment, lower bearing for the screw support.
The new upper housing
Now on to the actual nuts and bolts.
The entire assembly was taken apart.
The new lower support plate with the lower bearing installed.
Holes for pins as well as the bolts holding it together.
A close up of the positioning pins.
A quick video tour of the cnc router z axis.
