Skinner Sights also makes/sells a Patridge-type square post front sight blade of .650" height, designed to be trimmed w/o thinning.
This sight measures 1/2", side-to-side, meant to fill an entire barrel dovetail, for sights mounted directly in the bbl, ILO on a ramp.
http://www.skinnersights.com/front_sights_5.html
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