YHM flip up sight allen screw size?

Discussion in 'Rifle & Shotgun Discussion' started by GFO, Nov 14, 2011.

  1. GFO

    GFO Active Member

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    Help! I'm trying to remove a YHM flip up front sight/gas block and I'm having a problem with the right size allen wrench. 1/8" is to big and 3/32" seems to loose. All the allen kits I have go from 1/8" to 3/32". Is there a special size that guns use? Or YHM uses? :huh:
  2. GFO

    GFO Active Member

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    Answered my own ? I looked at the Yankee Hill website and it says 7/64"