Other than a nebulous &quot;it works at short ranges and is snag-free&quot;, I can&#x27;t point to point to anything quantitative.  I think that&#x27;s in part because the design is uncommon.<p>Trench sights show up every now and then (e.g., Colt New Agent), but the Guttersnipe is (and I think remains) unique in that the sight channel was tapered.  For the sight picture, imagine a square divided into 4 triangles: left, right, and bottom would be from the sight, and the 4th would be an open triangle on the target.  When sighting, one would balance the three sight triangles, and put the v notch that is formed on the target.<p>There are some that claim that simple geometrical shapes, like triangles, have a speed advantage in optimizing the sight alignment (e.g., Advantage Tactical with their &quot;pyramid&quot; shape, or Steyr&#x27;s trapezoid sights) over the more familar notch and post.  That sounds like something that should be easy to test, but I&#x27;m not aware of a well-conducted study (amateur or otherwise) that sheds useful light on the question.<p>Edit: Just occurred to me, the Guttersnipe does have a far shorter track length than conventional sights.  Not sure how that is meaningful in practice though.