Holosun Technologies, 509T X2 Red Dot, Multi-Rectical System (MRS) 32 MOA Circle and 2 MOA Dot, 2 MOA Dot, 32 MOA Circle Black, Solar Failsafe, Shake Awake, Black, Titanium, Includes RMR Adapter Plate (Not compatible with ZEV or Shadow Systems)

(4 customer reviews)

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The HE509T-RD X2 is an enclosed reflex optical sight designed for pistol applications. Features include a Titanium housing, Holosun’s Super LED with up to 50k hours battery life, Multi-Reticle System, Solar Failsafe, and Shake Awake. This X2 version adds improved glass clarity, Lock Mode, and a full Multi-Reticle System providing 32MOA circle with 2MOA dot, dot only, or circle only reticle options.

The included 509T RMR adapter plate is not compatible with ZEV or Shadow Systems style RMR interfaces.


  • The included 509T RMR adapter plate is not compatible with ZEV or Shadow Systems style RMR interfaces
  • CR1632 battery port does not require removal of optic from firearm
  • Improved programming that enhances usability
  • Addition of Lock Mode: Lock mode locks out the buttons until a deliberate long press unlocks them
  • Improved glass clarity
  • Auto mode now runs in the background and offers solar power when there is no battery or dead battery
  • Up to a 50,000 Hour battery life
  • Solar Failsafe
  • Multi-Reticle System (MRS): 32 MOA Circle & 2 MOA Dot
  • 2 MOA Dot
  • 32 MOA Circle
  • Shake Awake Technology

In the Box

  • RMR Adapter
  • T10 L Key
  • User Manual
  • CR1632 Battery
  • Lens Cloth


Additional information

Weight 1 lbs
Dimensions 6 × 6 in

4 reviews for HOLOSUN 509TRD-X2 RED DOT

  1. Jayden Daniel (verified owner)

    A great RDS ready for anything. This was my first pistol red dot, and I have been really impressed with it. Sent my G17 slide off to get milled for direct mount. Makes for a really solid attachment. I will getting more of these for pistols, shotguns, and rifle piggybacks.

  2. Bob Cenk (verified owner)

    Very happy with this optic. I have a few RMR’s and SRO’s and the Holosun 509 definitely performs just as well if not better!

  3. davidwzimmer (verified owner)

    Great enclosed emitter. I own quite a few Holosun optics and this one is my favorite. Setup on an Arisaka offset mount and its 🤌.

  4. Wecameforyourkings (verified owner)

    I love this optic! I was on the fence between this and a trijicon RMR and I’m more than happy with this closed emitter optic!

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