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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:
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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”.
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Round aperture
diameter
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Rectangular aperture
with same brightness
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Actual Rectangular
Dimensions
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0.036”
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Size 36
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0.023” x 0.045”
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0.038”
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Size 38
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0.024” x 0.048”
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0.040”
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Size 40
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0.025” x 0.050”
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0.042”
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Size 42
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0.025” x 0.055”
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0.045”
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Size 45
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0.028” x 0.056”
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0.046"
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Size 46
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0.025 x 0.065"
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0.048”
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Size 48
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0.030” x 0.060”
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0.050"
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Size 50-3x
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0.025" x 0.075"
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0.052”
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Size 52
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0.032" x 0.064”
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M1/M1A NM hood
0.042"
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Size 42
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0.026" x 0.052"
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M1/M1A NM hood
0.052"
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Size 52
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0.030" x 0.075"
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| Size 59 | 0.032" x 0.088" | | Williams Rear Sight 0.040" - 0.050" | Sizez 40 to 50 Slit Shaped | 0.025" to 0.030" tall |
Apertures
for M1A/Garand NM sights are offered with an opening of 0.026" x 0.052"
(equal brightness to a 0.042" round aperture), 0.030" x 0.075" (equal
brightness to a 0.052" round aperture), and 0.032" x 0.088" (0.0595"
equivalent diameter). These are offered as NM hood/rack
assemblies, or as hoods only. Stoning the edges of the NM rack
will be required to fit your sight base.
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
ORDER
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