The M-60E3 is a general purpose machine gun and variant of the M-60 Series of machine guns. It was developed by Saco Defense in the United States. This variant was introduced as a lightweight and more updated variant to the weapon and possessed a foregrip.
Mario Warfare[]
In Mario Warfare the M-60E3 was seen in the hands of Bullet Bill as his primary weapon against Rool's Army. He used it during his service to the King who was a prince by that time.
Later on Luigi who was going to use it against the Koopa Empire with the others. This however didn't happen due to the fact that Luigi was incapable of walking and Mario wasn't able to carry him, leaving Luigi at Smash Club headquarters.