Loading... Please wait...

Like Us on Facebook!


Add to Wish List

Click the button below to add the GM-M7 14.5" 5.56 NATO w/Ext. 1:7 to your wish list.

You Recently Viewed...

GM-M7 14.5" 5.56 NATO w/Ext. 1:7

Calculated at checkout

Product Description

5.56mm,1:7 twist, 14.5" length, 41V50, carbine length gas system, fully machined with extension (M4 feed ramps), chrome line bore and chamber, muzzle threaded 1/2x28, .750" gas block, carbine length ,  phosphate finish, pre-drilled for gas port, weighs 1.75 lbs. Barrel has been button rifled, air gauged, and stress relived.

Barrel is not pinned for front sight.

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

Write your own product review

Product Reviews

Showing reviews 1-5 of 6 | Next

  1. excellent barrel 5 Star Review

    Posted by on 8th Aug 2016

    Incredible barrel, just what I was hoping for. zeroed it this weekend, worked perfectly. Gas hole comes pre-drilled and appears to function perfectly, no issues. Sometimes you pay for quality in life, this barrel is quality.

  2. Great looking product. Great customer service 5 Star Review

    Posted by on 4th Apr 2016

    The product looks great, it's perfect for my M4 project. Can't wait to finish it and take it to the range. Customer service was phenomenal. I will definately buy my next barrel here again. Thank you guys.

  3. Groups great @ 100 5 Star Review

    Posted by on 11th Feb 2016

    So far i have fired 350 rounds from this barrel have of which where tula .223 55g ammo; the other half being FED .223 and XM855. If any of this information has merit to anyone hear you go. This will be my second buy from GM; first was an 18" SS barrel. I cant reiterate how happy iam with them. I bought a cheap radical arms barrel once and will never look back ever since i started buying from this company, I even get a thank you letter with a sticker weeks after i get my item.

    Anyways check out the pics for yourself.

    <a href="http://s33.photobucket.com/user/losaltos6/media/Mobile%20Uploads/KIMG0131_zpshz8mt3pq.jpg.html" target="_blank"><img src="http://i33.photobucket.com/albums/d84/losaltos6/Mobile%20Uploads/KIMG0131_zpshz8mt3pq.jpg" border="0" alt="Gm 1/7 photo KIMG0131_zpshz8mt3pq.jpg"/></a>


  4. First AR Build 5 Star Review

    Posted by on 11th Dec 2014

    Decided to build my first AR and found Green Mountain just by chance. Glad I did. Great barrel for the price. I will definitely be purchasing another barrel from Green Mountain for my next build.

  5. Great quality and Service!! 5 Star Review

    Posted by on 8th May 2014

    Looked for the right barrel for my first complete M-4 build. I remember a custom black powder builder using your barrels, So I looked you up and found the barrel with the best features you could ask for. The price was a no brainer from a barrel builder compared to a unknown and unrated company.
    Great accuracy and have smoked several Wild Hogs with this barrel.

Showing reviews 1-5 of 6 | Next