Compact 20 mm rifle red dot with a 2 MOA gold dot and a rotary brightness switch that doubles as the battery cap – supplied with both low and lower 1/3 co-witness mounts.
$453.70
Available on back-order
The Holosun HE403R-GD is a 20 mm micro red dot sight for rifles and carbines, with a 2 MOA gold (590nm) dot and a rotary switch on the left of the body for selecting brightness. The rotary knob also holds the CR2032 battery, which gives up to 50,000 hours on setting 6. It comes with a lower 1/3 co-witness mount (1.63 in) and a low mount for rifles with a low comb, so it suits AR-pattern rimfires, lever actions and shotguns used in Australian service and 3-gun matches. Holosun also made this rotary-switch 403R in red (HS403R); this listing is the gold-dot version, which stands out against green and brown backgrounds.
Is the HE403R-GD the same as the HE403C? No. The 403R uses a rotary switch and has no solar panel; the 403C has push-button controls with Solar Failsafe. 3GT’s listing was previously titled HE403C-GD but the sight supplied is the HE403R-GD.
How do I change the battery? Unscrew the rotary switch cap – the CR2032 sits inside it, so the sight does not need to come off the rifle.
Which mount height should I use on an AR-15? The 1.63 in lower 1/3 mount for an AR-style flat-top; the low mount suits rifles and shotguns with a lower comb.
3 Gun Tactical is a licensed firearms dealer (Dealer Licence 50001578) in Tingalpa, Brisbane QLD. Optics and accessories ship Australia-wide.
The Holosun HE403R-GD is a 20 mm micro red dot sight for rifles and carbines, with a 2 MOA gold (590nm) dot and a rotary switch on the left of the body for selecting brightness. The rotary knob also holds the CR2032 battery, which gives up to 50,000 hours on setting 6. It comes with a lower 1/3 co-witness mount (1.63 in) and a low mount for rifles with a low comb, so it suits AR-pattern rimfires, lever actions and shotguns used in Australian service and 3-gun matches. Holosun also made this rotary-switch 403R in red (HS403R); this listing is the gold-dot version, which stands out against green and brown backgrounds.
Is the HE403R-GD the same as the HE403C? No. The 403R uses a rotary switch and has no solar panel; the 403C has push-button controls with Solar Failsafe. 3GT’s listing was previously titled HE403C-GD but the sight supplied is the HE403R-GD.
How do I change the battery? Unscrew the rotary switch cap – the CR2032 sits inside it, so the sight does not need to come off the rifle.
Which mount height should I use on an AR-15? The 1.63 in lower 1/3 mount for an AR-style flat-top; the low mount suits rifles and shotguns with a lower comb.
3 Gun Tactical is a licensed firearms dealer (Dealer Licence 50001578) in Tingalpa, Brisbane QLD. Optics and accessories ship Australia-wide.
| Brand | Holosun |
|---|---|
| Model | HE403R-GD |
| Sight Type | Micro rifle red dot (20 mm) |
| Reticle | 2 MOA dot |
| Reticle Colour | Gold |
| Light Source | Super LED, 590nm |
| Magnification | 1x (parallax free, unlimited eye relief) |
| Control | Rotary brightness switch |
| Battery | CR2032 (in rotary switch) |
| Battery Life | Up to 50,000 hours (setting 6) |
| Solar Failsafe | No |
| Brightness Settings | 12 (10 daylight, 2 night vision) |
| Power-Saving | Shake Awake, memory |
| Adjustment per Click | 0.5 MOA |
| W&E Travel Range | ±50 MOA |
| Window Size | 20 mm diameter |
| Dimensions | 2.75 x 1.43 x 1.62 in (approx. 70 x 36 x 41 mm) |
| Weight | 3.53 oz (approx. 100 g) |
| Mount | Lower 1/3 co-witness (1.63 in) and low mount included |
| Housing Material | Aluminium, MAO finish, black |
| Waterproof Rating | Submersion 1 m / 30 min (IP67 per Holosun product copy) |
| Vibration Rating | 1000G |
| Operating Temperature | -30°C to 60°C |
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