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.
Posted by Red 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.
Posted by Tracy 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.
Posted by Sandra Brunk on 21st Jul 2016
Posted by Matt 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.
Posted by Grant Dean on 12th May 2016
Bought about a year and a half ago. Good barrel, good price. No issues and seems to be pretty accurate.