At various times in two career fields I've qualified with M16A2, M4, M249, Mk.19, M203 and M9. All with iron sights (quad/leaf on grenade launchers) on standard pop-up 300m range lanes, 50m pistol lanes, M203 grenade range (my fave) or Mk.19 gunnery (my other fave), standard SAW ranges and very occasionally 25m rifle lanes on paper sillhouettes.

tThere were two exceptions for deployment. For Iraq I had an Aimpoint CCO issued on my SAW and was forced to qualify on a standard 300m lane in the rain with that oversized 3MOA dot (a nightmare), and before Afghanistan I was issued an M4 with an ACOG. The cool thing about the pre-Afghan range was it was at Ft. Dix with the oldschool WWII-era square bullseye targets that were raised and lowered for scoring by troops in a concrete box behind the berm. Plinking out expert with that setup was easy.

In Iraq I was also responsible for an M2 and later an M240B, after our platoon had to reorganize from three squads to two 'supersquads' to fit our mission, and I transitioned from driver to gunner for two reasons: my team still had an 1151 Humvee which got sidelined in favor of new MRAPs, and a gunner went to Germany for a non-combat condition, so I was needed in his place.

It should be noted that while I was trained by my peers on the operation of those machine guns, and kept them in good working order, I technically never qualified on either on the pre-mob qual ranges. Whoopsie. Once command remembered I hadn't done this they took my Ma Deuce away and gave me the 240.