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3/15/2006 4:34:33 PM EDT
I'm building with an A1 upper and have seen some barrels I could use, but the front sight is marked F for flat top. What are the height differences and can the sights compensate for it? Thanks, Mike
3/16/2006 6:37:02 PM EDT
[#1]
  I recently built a flat top, carbine ff hand guard, 16" bbl.   When I was sighting it in I discovered the front sight post was too short.   It was turned out almost above the ears of the front sight.  It was explained to me that this configuration required a taller front sight.  Midway or Brownells have extended front sight post.  I contacted my parts supplier and was sent a new post at no charge.
You may have the opposite problem and need shorter post for your "F" stamped front sight base.
 
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