There is a whole youtube rabbit hole you can go down showing videos of miniature versions of larger (larger caliber) guns. The smallest I saw was “replica” Civil War Navy revolver that the whole gun was about 6cm long. It was a functional gun that had a powder charge with a projectile.
The appetite for 7nm ICs may be greater than the domestic ability to supply. Just because they can make 10,000 may not mean they can make 10,000,000.