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GM-M20 20" 223 Wylde Chamber

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Product Description

223 Wylde Chamber, 1:8 twist, 20" long, 416 stainless steel, weighs 2.20 lbs.,  Fluted, honed, button rifled, air gauged, stress relieved, passivated, bead blasted matte finish,  Nickel Boron extension with M4 feed ramps, and has a rifle length gas block. 

Barrel is not pinned for a front sight base.

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

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Product Reviews

Showing reviews 1-5 of 59 | Next

  1. Replace your OEM AR barrels! 5 Star Review

    Posted by on 20th Mar 2018

    Replacing a 16 inch OEM govt profile barrel with this 20" Wylde that has all one needs to reach out and touch sonething. Quality care upfront by GM means quality production on the business end for the shooter. A made in America barrel for 1/4 of the cost if mounted as part of a name brand upper. Thanks Green Mountain.

  2. Great Barrel! 5 Star Review

    Posted by on 8th Mar 2018

    Looked up Green Mountain because my Dad used one of their barrels on a muzzleloader build back in the 80's. When i saw they made AR barrels, i had to try one. After sighting in the scope, this barrel is shooting 3 round groups at 100 yards with 69gr match ammo that can be covered up with a quarter. Haven't even put 50 rounds through it yet. My skills are the only thing holding it back. Excellent fit and finish too. I'd recommend it to anyone!


    Posted by on 5th Mar 2018

    I'm excited with the quality and value of the barrel. Shoots well, cleans up easily and is a nice weight for the profile. I would recommend....

  4. Got Sub-Moa? 5 Star Review

    Posted by on 15th Feb 2018

    I am still in the process of breaking in the barrel. Not that it needs it. I am new to the Precision Shooting world. But I am stunned at the accuracy of the barrel. I went from a 1 and 9 twist 16 inch barrel to this. I am trying to get into PRS. With my current setup I should have no problem. Shout out to Green Mountain rifle.

  5. best barrels on the planet 5 Star Review

    Posted by on 4th Feb 2018

    I purchased the ar15 20" 223 wylde barrel for my build. I have been using green mountain barrels for over 25 years now mainly ruger 10/22 and muzzle loader barrels so it was a no brainer when looking for a new barrel. I cant say enough good things about this company and their products. After the break in period this barrel with my handloads will shoot 1/4" 5 shot groups @100m. Dont waste your money on other barrels that cost 2-3 times more. Fit, finnish and craftsmanship is second to none. Buy with confidence.. Thank you all at green mountain for another first class product..

Showing reviews 1-5 of 59 | Next

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