Step 3 is swaging out the dents in the tube.
Insert the swage
Mount the mag on the swage and clamp the swage in the vise. The hammer work here is a little tricky. Mostly you put on a leather glove and slide the mag back and forth forcing it down on the swage. The parrot is one of Hugh's spies.
The hammer is used to smooth down the raised dents. I use the copper to protect the mag from hammer blows. The swage is up to the hold open slot in this photo. This is a slow careful process.
Step 4 is reassembling the mag. This one got a new GT hi performance mag spring. Photo shows pushing the follower button back in with the vise
finished mag in next email