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GM-M8 16" Mid Length gas system 5.56 NATO

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Product Description

16", mid length gas system, 5.56mm NATO 1:8 twist, 41V50, chromed bore and chamber, phosphate finish, button rifled, thermo stress releived, precision air gauged, gas port, assembled with M4 extension with M4 feed ramps, muzzle thread 1/2 x 28.  Barrel is not pinned for front site. Weighs 1.9 lbs.

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

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Product Reviews

Previous | Showing reviews 6-10 of 56 | Next

  1. G-M8 mid length rifle barrel 5 Star Review

    Posted by on 5th Aug 2016

    This Barrel was purchased for a personal build and sits on top of a Bravo Company lower, the barrel head spaced to my Windham bolt perfectly with Clymer Go/No go gauges, and the Gas block fit perfectly as well. I have yet to take it to a range but the quality was excellent, shipping was quick.

  2. high quality 5 Star Review

    Posted by on 1st Aug 2016

    Can't beat the quality and the price. I've used Green Mountain barrels for 2 AR builds, accurate and well made. I'll be ordering again soon. Thanks GM.

  3. Awesome 5 Star Review

    Posted by on 21st Jul 2016

    Great barrel

  4. Very nice quality 5 Star Review

    Posted by on 16th May 2016

    Just ran 100 rounds through it yesterday for the first time. Had a couple hiccups with failure to fully lock up with the bolt. (2 out of 100). I attribute this to a brand new barrel and bolt getting broken in. My ar is not set up for accuracy but i was getting nice groups with a 3moa red dot site at 100yrds. Fit and finish are excellent! I like the weight too. Not a pencil barrel for sure but lighter than my daniel defense s2w. I would definitely buy again. The shipping was fast and the barrel was well protected on arrival. GM even sent a follow up letter to say thanks for the purchase, nice touch.

  5. Good Barrel 5 Star Review

    Posted by on 12th May 2016

    Bought about a year and a half ago. Good barrel, good price. No issues and seems to be pretty accurate.

Previous | Showing reviews 6-10 of 56 | Next