Description
The Holosun HE509T-RD-X2 is an enclosed-emitter red dot sight for pistols, machined from grade 5 titanium. Because the LED emitter sits inside a sealed housing, dirt, lint and water cannot block the reticle the way they can on an open reflex sight, which is why the 509T is popular for duty carry and hard outdoor use. It runs Holosun’s red Multi-Reticle System – 2 MOA dot, 32 MOA circle or circle-dot – from a side-loading CR1632 battery with a Solar Failsafe panel for up to 50,000 hours on setting 6. The X2 version adds improved glass clarity and Lock Mode. The sight uses the Holosun 509T footprint and ships with an RMR-to-509T adapter plate, so it fits most RMR-cut optics-ready slides.
- Enclosed emitter design with X2 glass clarity – reticle protected from debris and moisture
- Multi-Reticle System: 2 MOA dot, 32 MOA circle or circle-dot, red 650nm Super LED
- Grade 5 titanium housing, titanium finish, black
- Solar Failsafe backup power plus Shake Awake, auto-off, memory and Lock Mode
- Side-loading CR1632 battery, up to 50,000 hours battery life on setting 6
- 12 brightness settings with manual and automatic brightness, including night-vision compatible settings
- 1 MOA per click, ±30 MOA windage and elevation travel, parallax free with unlimited eye relief
- IP67 waterproof, 5000G vibration rated; window 0.66 x 0.9 in (approx. 17 x 23 mm), body 1.6 x 1.16 x 1.13 in (approx. 41 x 29 x 29 mm), 1.27 oz (approx. 36 g)
- In the box: sight, RMR-to-509T adapter plate, 2 x 6-32 x 1/4 in screws, lens cloth, multi-tool, manual, warranty card
FAQ
Will the HE509T-RD-X2 fit an RMR cut slide? Yes – Holosun includes an RMR-to-509T adapter plate in the box. Direct mounting needs a slide or plate cut for the 509T footprint.
What is the advantage of an enclosed sight over the HE508T? The 509T’s emitter is sealed inside the housing, so rain, dust and lint cannot obscure the reticle; the 508T is an open reflex design with an exposed emitter.
Which reticle colours are available? Holosun lists the 509T X2 in red (this listing), green (HE509T-GR-X2) and gold (HE509T-GD-X2), plus FDE housing options.
3 Gun Tactical is a licensed firearms dealer (Dealer Licence 50001578) in Tingalpa, Brisbane QLD. Optics and accessories ship Australia-wide.







Reviews
There are no reviews yet.