Hallo.
According to the listing I've found in an excellent book
Austro-Hungarian army aircraft of World War One by P.Grosz, G.Haddow and P.Schiemer, Schwarzlose M 7/12 was the primary machine gun of frontline Fliks. For example - this type of mg accounted for about 70% of mg complement of the units in December 1916 and approximately 80% - in July 1917 and March 1918, respectively.
In my opinion, most types of Austro-Hungarian armed airplanes were equipped with M 7/12, if not all.
Greetings
Marek