Red dot sights made by Holosun are a great choice for those who are looking for a quality, affordable red dot sight. Even though these devices are made in China, they perform well and even better than some more expensive red dot sights on the market. Holosun uses special symbols (letters) to indicate the function of the device. Because the meaning of these symbols is scarcely explained anywhere on the web, we have decided to list all their symbols and their meanings here to help the users and potential buyers.
HS – a Holosun standard, non-elite model. The illumination of the device is red and the housing is made of aluminum.

a Holosun standard, non-elite model
HE – a Holosun Elite model. ‘Elite’ indicates that the device has one or two of the following characteristics:
- titanium housing
- green illumination
- gold illumination

HE – Holosun Elite. The model in the picture is referred to as ‘Elite’ because of the green illumination.
A – The battery compartment is located at the bottom of the device. The red dot sight features a unique mount made by Holosun (other Paralow devices have the same footprint as Aimpoint Micro).
B – The battery compartment is located at the side of the device. To access it, the user has to pry open the battery tray.
C – the device features a solar panel. The battery is in the tray on the side.
G – The battery compartment is located at the side of the device. To access it, the user has to remove the round-shaped cover.
M – The device is made out of a strong, military-grade T7076 aluminium and features a glossy finish.
R5 – The device features a visible red laser.
G5 – The device features a visible green laser.
U – The turrets for elevation and windage adjustments are shrouded (protected from the sides).
T – The device is made of titanium.

HE508T-RD Is made of titanium
L – This symbol indicates a new, improved model that retained the features of the previously introduced model (with the device HS403GL, for example, symbol “L” indicates that it is an improved model of the HS403G device).
FL – The device features flip-up covers (Paralow models with number ‘1’ in their names (e.g. HS515CM) come with flip-up covers by default)
FDE – The device comes in the flat dark earth color.
RD – The product features red illumination.

‘RD’ models come with red illumination
GR – The product features green illumination.

‘GR’ models come with green illumination
GD – The product features gold illumination.

‘GD’ models come with gold illumination
R – The device has a rotary switch for illumination control instead of buttons.

‘R’ models come with a rotary switch for illumination control instead of buttons

‘R’ models come with a rotary switch for illumination control instead of buttons
ACSS – the device comes with Primary Arms’ CQB ACSS reticle.

HS503G-ACSS comes with Primary Arms’ CQB ACSS reticle
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