These front apertures provide greater visibility of the target.  Especially helpful in standing shooting as they allow the shooter to more easily see the target on approach.  They are available in a variety of inside diamaters and wire thicknesses, making it easy to customize the sight picture to personal preference and eyesight.  We recommend choosing several options to determine the best solution for your needs.  Currently available as listed below.  The first number is inside diameter of the aperture, the second number is wire thickness (smaller numbers are thinner).  Please indicate your preference(s).

3.0-8, -10

3.2-7, -9, -11

3.4-6, -8, -10