Rob Allen Go Pro Mount to suit Railguns. Easily attaches to the barrel for awesome underwater filming. The low profile of the attachment causes minimal friction in the water. The option to attach different GoPro arms gives you flexibility in the angle you wish to capture. The flexible cylindrical clip attaches around the barrel of the gun and can be attached at almost any point along the barrel depending on your personal preference. A tight clamp and the textured inside of the clip ensure a secure grip on the gun barrel so you don't have to worry about your camera capturing unintentional footage of the sea floor.