ShootingSight Rectangular Apertures

ShootingSight Rectangular Apertures improve focus at the junction between the front sight post and the target.  

 

Testimonials from shooters who have used rectangular apertures. (Click here)

 

 

Testing by Jim Owens and shooters from a military rifle team show an average 15% reduction in group size for 6 o'clock hold shooters!  (Click for summary of testing).

 

 

HELPS ASTIGMATISM!  New testing shows that orienting the long axis of the rectangular aperture parallel to the principal axis of an astigmatism (rather than keeping it horizontal), allows the aperture to correct for astigmatic distortions in the eye.  (Click for detail).

 

 

Here's how it works:

 

Pinhole photographs using round and rectangular pinholes show the difference your eye sees in the width of the horizontal blur line seen at the top of the sight post, and the bottom of the target.  Horizontal blur is reduced by 30%, without sacrificing brightness.  Testing by shooters showed a reduction in group size of 15% when shooting a 6 o'clock hold.

 

Every shooter has to compromise between a large sight aperture for a bright target image, and a small aperture for sharp focus.  Your choice is between dim and fuzzy.

 

ShootingSight Rectangular Apertures (patent pending) give you the best of both worlds!  A bright, high contrast image, and crisp edges between the front sight and the target.  No more compromising. 

 

  • Rectangular Apertures improve focus at the critical horizontal juncture between the top of the front sight post, and the bottom of the target, improving aim.

 

  • Rectangular Apertures give you the bright, high contrast image of a large aperture so you can see clearly, even on a dim day.

 

  • Rectangular Apertures give you bright and sharp at the same time to let you see better, aim better, and shoot better.

 

With ShootingSight Rectangular Apertures, you can shoot with an aperture that is as bright as the largest round aperture, and still have the horizontal focus better than the smallest round aperture.

 

How do they work? - Click here for details

What size is best? - Click here for details

Apertures for AR-15 are offered in sizes equivalent in brightness to round apertures from 0.036”, to 0.052”. 

 

Round aperture

diameter

Bright Focus aperture

with same brightness

Actual Bright Focus

dimensions

0.036”

Size 36

0.023” x 0.045”

0.038”

Size 38

0.024” x 0.048”

0.040”

Size 40

0.025” x 0.050”

0.042”

Size 42

0.025” x 0.055”

0.045”

Size 45

0.028” x 0.056”

0.046"

Size 46

0.025 x 0.065"

0.048”

Size 48

0.030” x 0.060”

0.050"

Size 50-3x

0.025" x 0.075"

0.052”

Size 52

0.032" x 0.064”

M-1/M-1A NM hood 0.042"

Size 42

0.026" x 0.052"

M-1/M-1A NM hood 0.052"

Size 52

0.030" x 0.075"

 

Apertures for M-1A/Garand NM sights are offered with an opening of 0.026" x 0.052" (equal brightness to a 0.042" round aperture) and 0.030" x 0.075" (equal brightness to a 0.052" round aperture).  Note, these are offered as hoods only, or as the entire rack/hood assembly.  Stoning the edges of the rack to fit your sight base will be required.

Installation Instructions if you have a Bob Jones Sight

Installation Instruction if you have a screw-in sight hood

Installation Instructions if you are starting with a standard flip aperture

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