> - Microstamping requirements for guns—printing a unique barcode on every bullet casing (Glock gen3 cannot be retired, thus, the auto-mode switch bug cannot be patched...)
I don't know much about guns, but I assume that would be on the hammer? Couldn't you remove that "microstamping" by lightly filing down the hammer or just using it a bunch and causing some wear?
For most modern guns, it would be the firing pin, also called the "striker". Nobody manufactures microstamped guns, but if they did, the striker is a $20 part you can replace in ten minutes - or you could just spend half an hour on target practice at your local range, because 200 rounds are apparently enough to wear the etching down to illegibility.