any update on the gun sighting?
also thinking of building a camera... I have a short 3 meter version of what they sell on ebay as an endoscope. some are up to 20 m usb cables. they are are also sellin them with micro usb connections now. I use mine through a pc, to inspect engines etc.. through the spark plug hole. Very small camera. They all have ir leds around the lens, and many are advertised as waterproof! also seeing wifi versions now, where the wifi part would be on the usb side of the 20m cable. Allowing some sort of spring loaded reel to let out and respool cable with out having a twisted cable.
Still in the brainstorming faze. I hope to post something as informative as you have, if I actually ever try this out.http://www.ebay.com/itm/6LED-Wireless-W ... bIckkxHS3Ahttp://www.ebay.com/itm/1M-2M-5M-6LED-A ... 2K8IBYRRVQ