This is a spoiler GoPro mount for the famous Cramer Truggy 4x4 RC car of Duke Doks
https://cults3d.com/en/3d-model/game/cramer-truggy-rc-4x4-full-3d-printed
Added the V2 version with smooth angle to avoid break and moved th support forward to allow to screw the Gopro screw easily
The author remixed this model.