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.
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!