There are many Rear Sight Tools available (e.g. http://amzn.to/1EJMfu4) but I thought - hey - let's just DIY this project and make our own!
I honestly wasn't sure if it would work. My main concern was any amount of "slop" would cause something to bind or twist...
But a quick SolidWorks model, toolpaths in SprutCAM and then machining it on the Tormach PCNC 1100 proved that it... well.. you'll just have to watch and see!
Trijicon Night Sights: http://amzn.to/1wjn7st
GoPro Hero 4: http://amzn.to/1C1FnJx
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Machining AR-15 Lower Receiver: https://www.youtube.com/watch?v=svtIp2wzl1A
DIY Arduino CNC machine with GRBL: https://www.youtube.com/watch?v=1ioctbN9JV8
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