Holosun HE509T X2 Green Dot Sight Multi-Reticle System – HE509T-GR-X2

The Holosun HE509T X2 Green Dot Sight (HE509T-GR-X2) is a 1x fully enclosed pistol green dot sight in a nitrogen-purged Grade 5 titanium housing on the 509T footprint, with the Multi-Reticle System — a 2 MOA green dot, a 32 MOA circle, or both together as a circle-dot. An RMR-to-509T adapter plate is included.

It is the green-emitter version of Holosun's toughest mini reflex sight. The emitter is sealed inside a nitrogen-purged titanium housing, so weather never reaches the LED and the glass will not fog from within, and a green reticle reads brighter to the eye than red at the same output. Solar Failsafe, Shake Awake and Lock Mode all carry over, with a CR1632 rated at up to 50,000 hours.

How It Compares

The same optic is available in HE509T X2 red and HE509T X2 gold. For an open-emitter titanium optic in green on the RMR footprint, see the HE508T X2 green dot sight. To put it on a rifle or shotgun rail, the 509T Picatinny mount at 1.63 in lower 1/3 and the 509T Picatinny mount at 0.82 in low profile are the two heights available. Browse every enclosed red dot sight and the full Holosun green dot sight range.

Ideal For

• Section 1 long-barrelled pistols and revolvers held on a UK firearm certificate
• Shooters who pick up a green reticle faster than red in woodland and low light
• All-weather outdoor use, where a sealed emitter keeps the dot clear
• Practical shotgun and pistol-calibre carbine builds using a 509T Picatinny mount

Key Features

• Housing: Grade 5 titanium, fully enclosed and nitrogen-purged
• Reticle: green Multi-Reticle System — selectable 2 MOA dot, 32 MOA circle, or circle-dot
• Footprint: 509T footprint, with an RMR-to-509T adapter plate included
• Illumination: 12 brightness settings — 10 daylight and 2 night-vision compatible
• Electronics: Solar Failsafe supplemental power, Shake Awake and Lock Mode
• Battery: CR1632, up to 50,000 hours of runtime
• Magnification: 1x, parallax-free

Technical Specifications

What's Included

• Holosun HE509T-GR-X2 enclosed green dot sight
• RMR-to-509T adapter plate
• Multi-tool, lens cloth and user manual

Warranty

Covered by Holosun's manufacturer warranty, handled in the UK by Xtreme Tactical.

UK Delivery & Support

UK-stocked and dispatched tracked from our UK warehouse — no import duties or customs delays — backed by UK-based support and Holosun's warranty.

Frequently Asked Questions

What footprint does the Holosun HE509T X2 Green use?
The Holosun HE509T X2 Green Dot Sight uses the native 509T footprint rather than RMR or RMSc. An RMR-to-509T adapter plate is included, so it can also be fitted to RMR-cut slides and RMR-pattern mounts.

Is the Holosun HE509T X2 Green fully sealed?
Yes. The Holosun HE509T X2 Green has a fully enclosed emitter in a nitrogen-purged Grade 5 titanium housing, so rain, mud and dust cannot reach the LED and the glass will not fog internally.

Why choose a green reticle over red on the HE509T X2?
The eye is more sensitive to green than to red at the same output, so the reticle on the Holosun HE509T X2 Green generally appears brighter and crisper for the same power draw, particularly against woodland and dark backgrounds.

What reticle options does the Holosun HE509T X2 Green have?
It uses the Multi-Reticle System, which switches between a 2 MOA green dot on its own, a 32 MOA circle on its own, and both together as a circle-dot.

What battery does the Holosun HE509T X2 Green use?
It runs on a CR1632 cell, with Solar Failsafe supplementing it from ambient light and Shake Awake sleeping the reticle when idle, for a rated runtime of up to 50,000 hours.

What is Lock Mode on the Holosun HE509T X2 Green?
Lock Mode disables the buttons on the Holosun HE509T X2 Green once brightness and reticle are set, so the settings cannot be altered by accident in a holster, a case or a range bag.