carbon ?

Discussion in 'Cleaning and Maintenance' started by johnfs, Aug 4, 2012.

  1. johnfs

    johnfs New Member

    i picked up used bushmaster ar upper
    i went ahead and cleaned it
    under hand guard in area towards front sight it has some carbon
    ery light but there normal?
    2nd picture is polished barrel

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    Last edited: Aug 4, 2012
  2. Sniper03

    Sniper03 Supporting Member Supporter


    Obviously there is a slight gas leak coming from the tolerances of the Gas Tube and the Front Sight Assembly as you are aware. However, if it is very light and the weapon is functioning properly "I would not be concerned with it." A lot of ARs do this. If you want to totally stop it if you should think you need to do so. Check the diameter of a few gas tubes and find one that is on the larger tolerance. Or you can remove what looks like in the picture (?) the standard front sight assembly. And get another aftermarket unit that has better tolerances. But as I stated if the weapon is working properly "Do not worry about it!":)

    Last edited: Aug 4, 2012