The photo shows the exact thing the title promises, a rifle strapped to a robot dog, standing in an ordinary field. That plainness is the power, it reads like news, not a skit. Everyone has joked about this future, and here it is.
How the packaging works
Title
The flat title reads like a confession, which makes it believable.
Thumbnail
The plain field photo proves the machine exists and actually stands.
Remix this
When the thing you made is shocking on its own, shoot it plainly and write the title flat. Dressing up an already unbelievable object makes it look fake.
The transferable lesson
Shoot the unbelievable thing as plainly as possible.