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GM-M11S M4 11.5", Finned Barrel in 5.56x45mm 1:7 Twist


Product Description

  • Caliber- 5.56x45mm
  • Twist Rate- 1:7
  • Length- 11.5"
  • Profile- M4, Finned ( Under "See 1 more picture" there is a detailed drawing of this barrel)
  • Finish- Nitride
  • Gas System Length- Carbine
  • Gas Block OD- .750+-(.001)
  • Steel Type- 41V50
  • Thread Pitch- 1/2x28
  • Weight- 1.50lbs

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Product Reviews

  1. 11.5" finned barrel 5 Star Review

    Posted by on 15th Sep 2022

    This barrel is well made and looks kick-ass. I put it on a LE sample SBR with select fire capabilities and seems to run great.

  2. Awesome made barrel 5 Star Review

    Posted by on 3rd May 2021

    The Craftsmanship that went in to this barrel is by far some of the best I've seen. Will take it to the range in a couple days. Thanks for the fast and friendly service.

  3. Great quality 5 Star Review

    Posted by on 10th Jul 2020

    The finned barrel was well made. I also purchased the 16” version a few years ago. I am am very satisfied with both and would recommend your products to all my friends.

  4. Great Barrel when not running a Suppressor 5 Star Review

    Posted by on 7th May 2017

    I bought this barrel because I wanted to build an SBR 11.5 in barrel. The barrel runs perfectly up to 400 yrds. Now shooting with my Suppressor is a different story. I would have failure to feed and and the bolt carrier would not lock back after shooting the last round esp with a 30rd mag. but over all I like this barrel and working on how to fix the problem with my suppressor issue.

  5. Accurate as an eagle, cool as a cucumber. 5 Star Review

    Posted by on 9th Sep 2016

    Test fired my new AR, I couldn't feel any heat from the barrel, shot from about 50 yards at a rubber cube and it hit about every time. I won't know how truly accurate this barrel is until I top it with my Aimpoint but for now, it's just what I needed.