M73

M73 or M-73 may refer to:


 * M73 machine gun, an American belt-fed machine gun
 * M-73 (Michigan highway), a state highway in Michigan
 * M73 motorway, a motorway in Scotland
 * BMW M73, a 1993 V12 piston engine
 * Messier 73, a random grouping of stars in the constellation Aquarius