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GM-M4-9 10.5" 9mm AR15 Barrel

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Product Description

9mm, 1:10 twist, 10.5", 1.2 lbs, Barrel for AR15 M4 Rifle with integral extension and installed alignment pin. Made from high grade 41V50 milspec steel, 1/2 x 36 UNS muzzle thread. Black nitride coated inside and out for enhanced wear resistance and extended performance, with a Full Auto chamber. Barrel has been button rifled, air gauged, and stress relieved Check with your installer for proper fit before purchasing.

Specification Details

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Product Reviews

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  1. Update 5 Star Review

    Posted by on 29th Dec 2014

    When I first received the barrel I had not installed it in the 9mm AR I was building so I gave it 4 stars. The build is now complete and I test fired it yesterday. 30 yds off hand you could cover a 30 rd group with the palm of your hand needless to say I'm pleased.

  2. 9mm ar barrel 4 Star Review

    Posted by on 17th Dec 2014

    The only reason for the four stars is because I haven't fired the barrel yet. It has been installed and the fit and finish were excellent, rifling looks crisp so I would expect it to be accurate just like the other Green mountain barrels I have.

  3. Perfect 5 Star Review

    Posted by on 16th Dec 2014

    Great barrel at a good price. Accuracy is outstanding.

  4. solid as a rock 5 Star Review

    Posted by on 16th Oct 2014

    I love these barrels. I have built hundreds of AR rifles, and these are the best barrels I have used for the price.

  5. Fantastic! 5 Star Review

    Posted by on 10th May 2014

    Ordered this barrel and it arrived promptly in just a few days. Finished my pistol build, and it is a tack driver! Amazing accuracy. I wish there were other options for different length barrels. I want to build a 14.5" pinned or a 16" 9mm carbine with a Green Mountain Barrel now knowing what a quality piece you get for the price!

Previous | Showing reviews 6-10 of 14 | Next