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  1. I

    New MK12 MOD O build accuracy issues

    Thanks guys, I appreciate the valuable suggestions. I spoke with PRI and they are clearly a good bunch of guys. They also suggested checking the rail as well as the ring screws, which I will do. They did test with 77gr OTM @ 40 yards and it put all shots into a single ragged hole. The PRI...
  2. I

    New MK12 MOD O build accuracy issues

    I'm gonna say about seventy rounds. Precision Reflex built the upper. I put together the lower. I just feel like it should shoot better with 55 grainers and the 64's. In my experience truly accurate rifles (well built rifles) should not be that finicky. Sure they have a specific load they...
  3. I

    New MK12 MOD O build accuracy issues

    I'm a FNG here and this is my first post. I just put together a MK12MOD 0 using a PRI upper, and a Noveske lower with Geissele SSA trigger. The the current optic is a Leupold Mark AR 3x-9x 40mm in a Burris Pepr QD mount. Took it to the range for the first time on friday and was somewhat...
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