Page 145 - FAT 105 4.17 MOODLE

Figure 21: Post and notch sight. Figure 22: Bead sight.

not allow as large of a sight picture, but There are also many different materials
will provide a greater chance of accuracy used to enhance the visibility/usability of
and precision because the smaller notch various sight systems. Basic enamel paint
does not allow for as much misalignment. is typically the most common sight en-
hancement, with various color dots be-
Post sights are so named because of the
ing painted on the front on rear sights.
use of only a front post sight. Post only
Phosphorescent paint is also used to cre-
sights are also known as “bead” sights.
ate sights that glow in the dark after being
There is no rear sight and the majority of
charged by an outside light source like a
the sight alignment comes from the barrel
flash light or the sun. Depending on the
and receiver. When the bead is properly
specific sights, the paint may glow for sev-
aligned it is barely visible above the plane
eral minutes to several hours. Various col-
of the barrel/receiver and is centered on
ors of fiber optic rods have been used as
the target. The bead sight system pro-
vides an approximation of impact based
on various birdshot and buckshot loads.
The bead is typically a small round brass
or steel ball that is screwed directly to the
barrel. The bead sight system is used pri-
marily with shotguns. The accuracy of the
bead sight system can be enhanced with
the inclusion of a barrel rib or middle
bead. The rib and mid bead provide a sec-
ond point of reference of where the fire-
arm is pointing.
Figure 23: Sight enhancement.

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