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GM-M29 14.5" 5.56x45mm 1:7 Twist


Product Description

  • Caliber- 5.56x45mm
  • Twist Rate- 1:7
  • Length- 14.5"
  • Profile- Government (Under "See 1 more picture" there is a detailed drawing of this barrel.)
  • Finish- Phosphate
  • Gas System Length- Carbine
  • Gas Block OD- .750+-(.001)
  • Steel Type- 4150 
  • Thread Pitch-1/2x28
  • Weight- 1.75lbs

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Product Reviews

Showing reviews 1-5 of 13 | Next

  1. Great Barrel 5 Star Review

    Posted by on 11th May 2021

    This is one of the better barrels I have bought for a build. No complaints!

  2. M29 GM Barrel 5 Star Review

    Posted by on 21st Apr 2021

    The M29 is a great barrel profile that is better for accuracy over standard mil profiles where the barrel is light under the hand guards and heavy (thicker) further forward.

    aside from the profile it is in fact a nice shooting barrel. thank you GM for producing the M29.

  3. OUSTANDING! 5 Star Review

    Posted by on 20th Apr 2016

    I used this barrel for a 3-gun build. I am getting sub MOA groups with cheap 55gr XM193 ammo. I am very pleased. The barrel was perfect when it arrived. Very well made, perfect. Green Mountain is my go to barrel maker@

  4. Very nice middle weight barrel 5 Star Review

    Posted by on 13th Jan 2016

    Really impressed with the quality of this barrel. The extension has a stud support added to prevent the extractor from being blown off during a head separation. There is a very nice target crown on this barrel as well. Phosphate finish is very tough, there were no marks visible from the vice jaws after machining the taper pin holes for the FSB. Barrel installed on the upper and head spaced with no issues. With a permanently installed extended A2 flash hider the barrel measured 16-3/16" from a closed bolt face.

  5. Great true Mid-weight barrel. 5 Star Review

    Posted by on 2nd Apr 2015

    I installed this barrel on a new carbine build, it was an excellent choice. Balances better than I thought it would. Fit and finish are exemplary, but accuracy is were this barrel really shines. I was shooting at 250 yards and easily shooting the empty Gatorade bottle hanging from the stand with a 4x optic standing. You will not be disappointed by the product or the service.

Showing reviews 1-5 of 13 | Next