Not that strange, looks like a "Day Ranger".
http://www.manitobamilitaryaviationm...18squadron.pdf
bottom of page 29 :
"On 30 September the unit made its first operational take-off from an airfield in continental Europe. Gray-Gibbons and Brook-McLaren left at
noon from St. Dizier to visit Erding (near Munich) and Eferding (Austria) airfields. At Erding their cannon fire chewed to pieces two parked fighters and damaged five more. At Eferding Gray blasted one fighter out of the air and his fire was eating up the tail and rear fuselage of another when his cannon ammunition ran out. He had to content himself with emptying his machine-guns on a bomber parked at Horshing."