“Toilet Seat” must be an Army or USMC term. It doesn’t ring any bells for this flyboy. In the USAF, there are only 2 levels of qualification with rifle or pistol - Qualified, for which you receive no ribbon or badge and Expert for which you receive a ribbon. In order to get the Expert ribbon, you must achieve a perfect score. If you fire expert with both rifle and pistol, you receive a bronze star on your ribbon.
Having qualified Expert with both, I did not have to demonstrate proficiency or take a class to get my CCW after I retired.
That's scary. I have both and I should never be left alone with a weapon. ;)
Not sure about the Army but in the Marine Corps, a “toilet seat” was the badge you got for being a Marksman. There are three levels of qualification : Marksman, Sharpshooter and Expert. The Marksman badge is square with concentric circles like a target. Or, as we call it, also resembling a toilet seat.
I never heard it called that in the Army but we certainly did in the Marine Corps.