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GM-M11 16" Finned Barrel in 5.56mm with ext.

Your Price:
$159.00 (You save $28.95)
Calculated at checkout

Product Description

5.56 mm, 1:7 twist, 16" long, 4150 steel, weighs 1.7 lbs., Black nitride finish, finned barrel, extension with M4 feed ramps, drilled gas port hole, 1/2 x 28" muzzle threading, .750 gas block, carbine length, button rifled, air gauged, stress relieved.   

Barrel is not pinned for front site.

Under "See 3 more pictures" the last one is a detailed drawing of the barrel. 

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Product Reviews

Showing reviews 1-5 of 21 | Next

  1. 16 inch barrel 5 Star Review

    Posted by on 10th May 2019

    looks great works great ! everyone wants to look at finned barrel. please make a 20 inch and a 350 legend barrel.

  2. two more please.... 5 Star Review

    Posted by on 28th May 2018

    Bought this barrel for a shop build hot rod. Love GMB but never know about unique parts. Wow, shoots like a laser. Bore sighted at 90 and went to the range. 10 for 10 at 100 on a 10" gong with an RMR during break in. I'm no old world master shooter, bad dominant eye ... . Shipped next day, packaged appropriately, plastic cap on threads. Buy these guys with the utmost confidence.

  3. 16" ribbed 5.56 5 Star Review

    Posted by on 19th Aug 2017

    nice barrel, I have a 20" fluted stainless green mountain too. It dimpled with a jig and a 35 deg. cobalt bit like butter! But this ribbed is a super hard temper and I could not even hardly score it. I gave up and just installed the gas block without dimples. Love the barrel!

  4. Excellent performances and one of a kind looks. 5 Star Review

    Posted by on 18th May 2017

    This barrel is impressive looking and even more so when installed under a free float hand guard that allows one to still see the barrel. Provides for a retro 1930s/40s look yet being futuristic at the same time. It shoots well and I have been able to produce average 100 yard groups in the 1.5" range with 55gr brass cased ammo. I am sure it can do better if I carried to try.

    Barrel as of the writing this has ~600 rds through it and the "finning" does aid in more rapid cool downs. I tested this against a similar weight barrel with a simple method. Could I hold my hand around it a few minutes after firing 60-90 rounds. The (GM-M11) I could by about 3-4 minutes. Not scientific I know, but I plan on the scientific test this summer when it is 115 degrees out and barrels don't cool down to the touch fast.

    My only REAL COMPLAINT is Green Mountain does not offer a similar finned barrel in a MID LENGTH gas system. Carbine length gas systems are so yesterday. Come on Green Mountain I would buy a few more if they were mid length gas systems in either 14.5" to 16" barrel lengths.

  5. Great looking quality barrel 5 Star Review

    Posted by on 2nd Mar 2017

    This barrel looks great and fits great. I can't wait to finish my rifle to try it out.

Showing reviews 1-5 of 21 | Next