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1919A4 Build Tutorial 5
      Install the rear top cover rivets, they will need to have a flat
ground on the sides to fit. Crush all the long rivets that go through the
top cover and trunnion in the press. The rear top cover rivets will need
some ingenuity to buck. I did mine with the TIG torch.
      Install the right rear cartridge stop and crush the rivet. Then
install the right front cartridge stop. I installed the front cartridge guide
to locate it and hold it in place then welede it in with the TIG torch.
      That completes the riveting, next step is to grind all the long rivets
flush with the sides of the receiver.
      Now grind the side plates flush with the trunnion, paying special
attention in the feed area. Break all the sharp edges on the right side plate.