MG 34 semi-auto
Receiver Tutorial 2
Overview of the reweld process
There are several ways to approach this project, The best is to use
overlapping parts. This will require parts of 2 or more receivers, but the end
result will be a usable receiver with only a minimal amount of fitting. This is
important on the inside where it is difficult to work and once welded the
weld is as hard as glass. Unlike some other reweld projects, the tolerances
inside the receiver are very close.
The first step is to inspect and select the parts you will use and to decide
where to cut them for the best fit. When ever possible stay away from slots
and holes as after welding they will be difficult to repair, specially if you are
using hand tools.
The more time you spend planning at this stage will save you a lot of time
in the end.
Once you have figured out your overlaps cut and square the parts,
remove all slag and sand blast them to remove the finish, rust and dirt.
The parts need to fit precisely in the jig so be sure to de burr all the parts
inside as well.
I squared off the front section and am working back from it. I cut and
squared the next section front and back and installed it on the jig. The third
section is cut a little longer than needed. This is a critical area as the grip
needs to fit properly.
The grip is used to trim the length of the third section. Pin it in the front
and measure the excess that needs to be trimmed off. If you are doing this
with a belt or disc sander remove the metal slowly and test fit the grip
several times until it fits properly.