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Old 28th November 2015, 07:03 PM
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Knockedover Knockedover is offline
Join Date: Apr 2009
Location: Nr Portsmouth,Hampshire
Posts: 1,011

I've shrouded a couple of guns now and always gone oversized on the tube, 20mm id on 16mm barrels, with a front and rear collar and both have been spot on. They've been fixed at the front collar but the rear has been free to move. My first was set up to tension the barrel when tightened and would shoot great but removal and refitting at a slightly different tension changed the zero. Leaving the back of it unfixed cured any shift and can be taken on and off with no shifting
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