M1 may refer to:
- M1 Thompson - A WWII-era American submachine gun.
- M1 Garand - A WWII-era American infantry rifle, refered to as solely "M1" in Call of Duty: Infinite Warfare.
- M1A1 Carbine - A WWII-era American infantry rifle.
- M1A2 Abrams - A modern day American tank.
- EM1 - A Directed Energy Weapon in Call of Duty: Advanced Warfare.
- M1 Irons - A revolver in Call of Duty: Advanced Warfare.