M1A1

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

Military

 * M1A1 Abrams, a variant of the M1 Abrams battle tank
 * M1A1 carbine, a variant of the M1 carbine with a folding stock for paratroopers
 * M1A1 Flamethrower, an anti-personnel weapon
 * M1A1 bazooka, a variant of the bazooka rocket launcher
 * Thompson M1A1, a variant of the Thompson submachine gun
 * M1A1, an anti-aircraft 90 mm gun
 * M1A1, a U.S. Army bangalore torpedo used in World War II

Other uses

 * M1A1, a port of the computer game Marathon
 * "M1 A1", a song on the album Gorillaz by Gorillaz