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  1. Technical Discussions & Troubleshooting
    After installing a new ACOG TA33R8 with the Tenebraex screw-on sunshade, the 556 SWAT groups were unpredictable and often more than 1” at 100 yards. Tried everything until one day, I noticed on the Top Rail, a screw below the ACOG mount that was protruding ever so slightly leaning to the right...
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