This would be cool if the "gun" had nfc or similar so that the app behaves differently, i.e. accepts physical trigger input. It wouldn't even have to look like a gun, it could just be a cool looking phone mount with a trigger on the bottom. It would be super cool if you could attach different barrels or parts to the main frame to use it as a different weapon, like sniper barrel and stock for a sniper, nothing for pistol, etc. I think that this might just be something we make for ourselves, because the father.io team would have to manufacture more hardware and it isn't completely necessary. I could see this as a customizable 3D printable/cheap accessory. It would be a bit like TekRecon if you have ever heard of that.