M1915

M1915 may refer to:
 * 305 mm howitzer M1915, Russian artillery piece
 * 37 mm trench gun M1915, Russian artillery piece
 * Standschütze Hellriegel M1915, Austro-Hungarian submachine gun
 * Ruby M1915, a self-loading pistol used as a French World War I sidearm
 * Beretta Model 1915, an Italian semi-automatic pistol in World War I