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03-19-2017, 12:38 PM
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US Veteran
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Join Date: Sep 2013
Location: SoCal, CA
Posts: 2,241
Likes: 735
Liked 1,039 Times in 671 Posts
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For $100, you can buy a brand new factory drop-in barrel with the new twist rate.
S&W M&P 9mm Full Size Barrel at G and R Tactical
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