What do you mean??
Afaik all Marauders had 4 fixed forward firing 50.cal on the side of the fuselage, additionally to the two guns in the cockpit.
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1st engined flight by Richard Pearse, Waitohi, New Zealand, March 31, 1902. Karl Jatho, 1st flight, 18.August 1903, Hannover-Vahrenheide, real controlled flights.
The Wrights, 1st flight, 17. December 1903. They wasnt the 1st, but still claim this!