The Holosun HE508T X2 Red Dot Sight (HE508T-RD-X2) is a 1x open-reflex pistol red dot sight in a Grade 5 titanium housing on the Trijicon RMR footprint, with the Multi-Reticle System — a 2 MOA red dot, a 32 MOA circle, or both together as a circle-dot — behind a 23 × 16 mm window.
Titanium is what you are paying for here. Grade 5 gives a considerably better strength-to-weight ratio than aluminium, so the housing takes hard use without adding mass on the slide, and the whole unit is rated IP67. The reticle set is the familiar 508/507 arrangement: 32 MOA circle for speed at close range, 2 MOA dot for precision, or both. The X2 revision adds Lock Mode, alongside Solar Failsafe and Shake Awake and a side-loading CR1632 rated at up to 50,000 hours.
How It Compares
The green version is the HE508T X2 green dot sight. For the same reticle in a 7075-T6 aluminium housing at lower cost, the HS507C X2 red dot sight is the standard option. For a fully enclosed titanium optic instead of an open emitter, the HE509T X2 red dot sight seals the emitter completely. Browse all RMR footprint red dot sights and the wider Holosun pistol red dot sight range.
Ideal For
- Section 1 long-barrelled pistols and revolvers held on a UK firearm certificate
- Hard-use range and competition guns where housing strength matters
- Pistol-calibre carbines on an RMR-pattern mount
- Airsoft GBB pistol builds that live outdoors year-round
Key Features
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Housing: Grade 5 titanium, IP67 water and dust resistant
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Reticle: red Multi-Reticle System — selectable 2 MOA dot, 32 MOA circle, or circle-dot
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Window: 23 × 16 mm viewing window
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Footprint: Trijicon RMR footprint, for RMR-cut slides and RMR-pattern plates
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Illumination: 12 brightness settings — 10 daylight and 2 night-vision compatible
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Electronics: Solar Failsafe supplemental power, Shake Awake and Lock Mode
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Battery: side-loading CR1632 tray, up to 50,000 hours of runtime
Technical Specifications
| Optic Type |
Open reflex pistol red dot sight, 1x (non-magnified) |
| Reticle |
Multi-Reticle System — 2 MOA dot / 32 MOA circle / circle-dot |
| Reticle Colour |
Red |
| Window Size |
23 × 16 mm |
| Footprint |
Trijicon RMR footprint |
| Illumination |
12 brightness settings — 10 daylight / 2 night-vision compatible |
| Battery |
CR1632 in a side-loading tray, up to 50,000 hours |
| Power |
Battery with Solar Failsafe supplemental power |
| Power Management |
Shake Awake motion activation; Lock Mode |
| Housing |
Grade 5 titanium |
| Water Resistance |
IP67 water and dust resistant |
| MPN |
HE508T-RD-X2 |
What's Included
- Holosun HE508T-RD-X2 red dot sight
- Multi-tool, lens cloth and user manual
UK Delivery & Support
Imported from the USA, duty paid by us, and dispatched tracked from the UK — nothing to pay on delivery — backed by UK-based support.
Frequently Asked Questions
Why is the Holosun HE508T X2 made from titanium?
The Holosun HE508T X2 Red Dot Sight uses a Grade 5 titanium housing, which gives a much better strength-to-weight ratio than aluminium. That means the optic survives harder use without becoming heavier on the slide, which is the reason to choose it over the aluminium HS507C X2.
Is the Holosun HE508T X2 an RMR or an RMSc footprint optic?
The Holosun HE508T X2 uses the Trijicon RMR footprint, so it fits RMR-cut slides and optics-ready pistols supplied with an RMR-pattern adapter plate.
What reticle options does the Holosun HE508T X2 have?
The Holosun HE508T X2 uses the Multi-Reticle System, which switches between a 2 MOA red dot on its own, a 32 MOA circle on its own, and both together as a circle-dot, shown in a 23 × 16 mm window.
What do Solar Failsafe and Shake Awake do on the HE508T X2?
Solar Failsafe draws supplemental power from ambient light and keeps the reticle lit if the CR1632 fails. Shake Awake switches the reticle off when the Holosun HE508T X2 has been still and restores it on movement, which together support the 50,000-hour runtime rating.
What battery does the Holosun HE508T X2 use and how is it changed?
The Holosun HE508T X2 uses one CR1632 cell in a side-loading tray, so the cell can be replaced with the optic still mounted and zeroed.
How is the HE508T X2 different from the HE509T X2?
Both use Grade 5 titanium housings, but the Holosun HE508T X2 is an open-reflex optic on the RMR footprint, while the HE509T X2 has a fully enclosed, nitrogen-purged emitter on the 509T footprint.
