whenever you see someone making the claim that a gun won't work on an aircraft, I urge you to look at our entire aviation history of vehicles with guns strapped on. Planes, helicopters, jet-packs, 'manned platforms', whatever your fancy.

we're not talking about glocks ductaped to DJIs here, and all of these mysterious engineer efforts that 'just doesn't work out' are hurdles that man has faced and conquered before.

What I would suggest is that if anyone trying to give you a technical reason that ends in "It just doesn't work" they are probably unprepared to accurately brief you on the topic.