GoPro NERF rail mount with and without trapped nut
Connect a GoPro no a NERF railToys
Creative Commons Attribution Noncommercial Share Alike
Commercial use is not allowed, you must attribute the creator, you may remix this work and the remixed work should be made available under this license.
Derived design with a trapped nut.
License is CC-BY-NC-SA
So you may make one yourself and improve the design but not sell the design or made parts.