Hobbnob: First Person Airsoft features a MK12 Gas Blowback Rifle Build in this video... "This is a gas blowback MK12 Mod 0 SPR based off the Tokyo Marui MWS platform, and the story of how I made it and how it's turned out.

Hobbnob: First Person Airsoft explains why he is not going to patent the airsoft POV camera that he demonstrated last time. He cites prohibitive costs for patenting, legal protection, and production. He also mentions the limited market, the potential for cheaper copies, and the current design's lack of user-friendliness. Individual cranial differences would require custom designs, adding to the complexity and potential for failure.