Stripped bolt. Use a punch to knock it out the right side by impacting it from the left side. Get a new bolt and nut. Several people have reported this problem with the 722. I had the same issue with my Kilo WT. Cheap bolts, that's all.
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What, Me Worry? - Alfred E. Neuman
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I see the light at the end of the tunnel, but the tunnel keeps getting longer - me