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twist rate

  1. 2012 M&P FS 9mm Twist Rate

    MP Full Size Pistols
    I've seen a lot of people trying to figure out what the new 2012 production barrel's twist rate is. The original barrels use to be a slow 1-18 twist rate (5 groove). I was wondering this myself seeing all the accuracy talk so I contacted Smith/Wesson and this is what they wrote back with the...
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