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GM-M21 16" 9MM barrel with a 1:10 twist

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Product Description

16" 9MM Melonited barrel with a 1:10 twist and made of 41V50 steel with a carbine length gas block with a 9mm Full Auto chamber. Threading is 1/2 x 36. Weighs 1.55 lbs.  Barrel is not pinned for front site base or hand guards.

Under "See 1 more picture" there is a detailed drawing of this barrel.

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Product Reviews

  1. Great barrel. 5 Star Review

    Posted by on 17th Feb 2016

    Purchased the barrel to build a suppressed 9mm AR. Barrels proved to be accurate and we'll made. I am becoming a fan of Green Mountain barrels having bought quite a few of them.

  2. 9mm barrel 5 Star Review

    Posted by on 5th Jan 2016

    very nice quality barrel
    good groups 147gr rn
    16" barrel with linear muzzle brake sounds like a 22lr
    love it
    nice tight fit

  3. good barrel 4 Star Review

    Posted by on 13th Dec 2015

    Overall quality is excellent, got some very good groupings with 125gr JHP slugs, wish they did a 10" barrel for a pistol build. But would buy again