M1A1

M1A1, M1-A1, M1 A1, or M-1A1 may refer to:

• M1A1 Flamethrower, an anti-personnel weapon
• an anti-aircraft 90 mm gun
• a U.S. Army bangalore torpedo used in World War II
• a variant of the M1 Abrams battle tank
• a variant of the M1 carbine with a folding stock for paratroopers
• a variant of the Thompson submachine gun
• a variant of the Bazooka rocket launcher
• a port of Marathon (computer game)
• a song by the Gorillaz on Gorillaz (album)
• a clothing label founded in New Zealand M1A1 clothing division
• a road built to link two major motorways in Yorkshire, England known during construction as M1 A1 Link