I am not building a full auto anything as that is illegal.
It was my understanding that a receiver also needed to be able to accept a barrel.
My pictures are of a WIP scrap piece of metal (not a receiver yet) that will be used to create a center repair section for a (completely legal even in my state) AK pistol.
These current WIP pictures I am posting now should set your minds at ease:
Finished exterior today , and will be cleaning up interior tomorrow of my center repair section.
The method to my madness:
Clamp it flat, and straight (use as many clamps as needed. Fit up is most important when welding):
Create 2 tack by using the 'melt, and cool' spanning method I described earlier in this thread:
Continue with span method using right side over tack span to left, cool, repeat until all filled in (took care of the 'evil' third hole while I was there):
Grind close to base metal but not all the way:
(cont next post)......