I currently use the Copper John Dead Nuts Pro with 0.019 pins. My honest opinion, the sight is good but the small 0.019 fiber optics are very brittle. On my first bear hunt last spring, I managed to break two fiber optics off while bush whacking. In all of my life bowhunting this is the first time I have ever seen anything like it. So what I did was replace the pins with the Cobra TKO pins. This system works but I'm thinking of going to the 0.029 size pin.
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