Other than machine guns, don't all guns fire one bullet each time the trigger is pulled? (when working properly)
That is the U.S. legal definition of a “machine gun”.
A gun that fires more than one cartridge per pull of the trigger.
Technologically, there are burst fire guns that fire three shot bursts (not really machine guns), such as the M16-A2 and later variants.
There are machine pistols, that can fire until the magazine is empty.
There are sub-machine guns that fire from the shoulder, same as above (pistol calibers).
There are automatic rifles and assault rifles, which are rifle sized guns that fire same as above.
Then come various full sized machine guns.
Then ganged machine guns like the quad 50 (four M2 machine guns fired simultaneously from one mount).
Then automatic cannon.
[Other than machine guns, don’t all guns fire one bullet each time the trigger is pulled? (when working properly)]
Man, many years ago they were correctly referred to as “self-loaders”.
Or “Ottermagic” if you were from central or northern FL. (grin)