No, this is a camera.
Aerial camera-gun ‘Type 89’ Konica. It was mounted on an aircraft and used in mock battles.
In other words, by shooting it like a gun, the target is shot, and if it shoots well, it is judged to have hit the target.
It doesn’t kill people, but it has an interesting retro-futuristic look, like something you might see in “Fallout”.
There were several other designs of gun-shaped cameras.
This one, for example, is a laser pistol.
Idea for next year’s April Fool’s Day, or just a fun story.