You could use a hollow tipped punch to do the circular crimp arounf the pin hole. I have some punches that have a holloy divit in the point to use to start roll pins and solid AR taper pins.
You could use a hollow tipped punch to do the circular crimp arounf the pin hole. I have some punches that have a holloy divit in the point to use to start roll pins and solid AR taper pins.