Goliton Camera Picatinny 20mm Rail Mount Side Rail Mount for Gopro Hero4/3+/3/2/1 Camera Fit for Gopro Hero4/3+/3/2/1 20mm rail Aluminum CNC made This is a gun mount for the GoPro HD Hero camera. It will work on a gun with a Picatinny/Weaver rail. Can be used with airsoft, BB guns, paint ball and basically any gun that has a Picatinny/Weaver rail. hunters, military, law enforcement, recreational shooters, and airsoft players.Get first-person-shooter style shots or reverse the camera on yourself and watch yourself in action.