Found this video (no sound) on youtube. I don't see any guns mounted on this plane though?
https://www.youtube.com/watch?v=4G2N4HGJus4
I have seen this video before on Youtube but not with this clarity & resolution. The first aircraft in the video is the very first AR-234 with landing gear it was V9. Later it was given the PH+SQ designation markings. What is interesting about this aircraft it is probably the most filmed & photographed of all the AR-234's made by the Germans during WWII.
Yet when you read books from an earlier era they get the facts wrong about this very aircraft.
For example from the very same book & only 1 page apart from each other the book totally contradicts it self.

One page over.

Well what happened they sent it to another facility to get a periscope rear guns bomb racks & so on & so on.
Yet the video evidence & photos don't support this fact.
Why you may ask?
Well the fact is this aircraft per the later books say PH+SQ never was fitted with a periscope & a few other things that I have talked about before.
The authors of earlier written books just quoted other sources with out verifying the facts as this example above shows. Some of the very same authors who wrote extensively about the AR-234B who wrote later editions of the same book changed their own findings.