How to I install the rivets in the ATA case I'm building so that they dimple the aluminum angle?

I use an air staple gun without staples to dimple the aluminum angle in place on the inside. Then I use pop rivets for everything else.

Raywitko, thanks for your response. Isn't the use of pop rivets contrary to ATA 300 Cat 1 regs?

Having not read the regs. couldn't really tell you. I've seen a lot of them made with pop rivets.

To withstand 100 shipments the ATA regs call for steel split rivets driven with such force to dimple the aluminum angle. I do not recall what the lower requirements are for cases designed to only withstand 10 shipments. Maybe pop rivets?