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GM-M15 M16 A1 5.56mm 20" 1:12 twist 20" Barrel

Price:
$176.95
SKU:
GM-M15
Shipping:
Calculated at checkout
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Product Description

M16 A1 5.56mm, 1:12 twist Rifle Barrel, 20" 41V50 Vanadium alloy milspec steel, fully machined and assembled with extension, chrome lined bore and chamber for optimum performance and durability, drilled gas port, phosphate finish. 1960s era M16 A1 pencil profile with traditional m16 feed ramps, muzzle threading 1/2 x 28, weighs 1.75 lbs.  This barrel is phosphate (black in color).   Barrel is not pinned for front site.

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


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Product Reviews

Showing reviews 1-5 of 66 | Next

  1. Very accurate barrel, great groups 5 Star Review

    Posted by on 23rd Oct 2017

    Used this barrel in a varmint build with a free float handguard and a 3# drop in trigger and am getting 0.544 MOA with handloads using Nosler 40 grain Varmageddon bullets and Benchmark powder with CCI 400 primers. I'm very happy with the accuracy in this highly recommended pencil profile barrel. Bought a second one tip build a retro M16A1 clone, and look forward to seeing what it'll do with drop in handguards and iron sights next.


  2. Great service and product 5 Star Review

    Posted by on 26th Sep 2017

    I think I have purchased three of these barrels from Green Mountain for different builds. These are great barrels for my retro builds. Could not be happier. GM offers great service too.


  3. good stuff 5 Star Review

    Posted by on 17th Aug 2017

    Have not shot it yet been busy with work but it came promptly and I checked it out it is beautiful


  4. Beautiful Bore and Finish 5 Star Review

    Posted by on 27th Apr 2017

    I work for Windham Weaponry, a stone's throw from Green Mountain's facility in New Hampshire. I received the barrel and we went through it with our bore scope to look at the interior. Wow! The free-bore and rifling were perfect and consistent, and the chamber was excellent, no rings, contacts or pitting anywhere! The chrome throughout the chamber and bore was consistent and smooth. I am using this for a retro-build M16A1 look-alike. The only wish I have would be to have the barrel at least cut for taper pins for a .625" gas block. I imagine Green Mountain doesn't do this incase a customer wants to use a low profile gas block with set screws or other styles. Overall, an extremely well made product that I highly advise anyone to use if doing a retro build or using it as a varmint rifle.


  5. Great Product ***** 5 Star Review

    Posted by on 11th Apr 2017

    While looking for a barrel for my M16 retro build I ran across an ad about a guy who bought one of GM 20" barrel, he compared it to one of his Colt built barrels and said the Green Mountain looked to be a better made barrel. All though I'm no expert the 20" Green Mountain barrel I bought is well made.


Showing reviews 1-5 of 66 | Next