HOLOSUN 509T-X2 Enclosed Reflex Sight
- Magnification Minimum: 1x
- Magnification Maximum: 1x
- Mounting Type: Weaver Mount
- Reticle Type: Circle-Dot
Last refreshed Jun 22, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
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ASIN: B09K1Z78RBModel: HE509T-RDX2Category: Handgun Scopes
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Overview
An enclosed reflex red dot sight for handguns with a titanium housing, RMR-footprint adapter plate included, and a multi-reticle system offering a 2 MOA dot alone or paired with a 32 MOA circle.
The enclosed design and titanium housing are meant to keep the emitter protected on a carry or duty pistol, and Shake Awake plus solar failsafe are aimed at keeping the dot ready without constant battery swaps. Buyers mounted it across a range of pistols, including Glocks and an FN 545, suggesting broad compatibility through the included RMR adapter.
- Grade 5 titanium, nitrogen-purged enclosed housing
- 2 MOA dot with switchable 32 MOA circle reticle
- Shake Awake activation plus solar failsafe backup
- RMR footprint adapter plate included
Who it's for
Suits handgun shooters who want an enclosed-emitter red dot for daily carry, duty use or range training, and who value a backup illumination source over battery alone. Not the pick for someone wanting an open-emitter sight or optics built for a rifle.
Pros and cons
- Enclosed emitter and titanium housing withstand slide-mounted recoil
- Solar failsafe backs up battery power
- Dual reticle option speeds close targets, keeps precision at distance
Specifications
| Brand | HOLOSUN |
|---|---|
| Model | HE509T-RDX2 |
| Dimensions & fit | |
| Item Weight | 0.11 pounds |
| Item Dimensions L x W x H | 1.6 × 1.2 × 1.1 inches |
| Construction & materials | |
| Material Type | Titanium |
| Color | Red 2 MOA Dot & 32 MOA Circle (HE509T-RD X2) |
| Lens Color | Red |
| Compatibility & installation | |
| Mounting Type | Weaver Mount |
| Compatible Devices | Handgun |
| Included components | |
| Unit Count | 1 |
| Warranty & support | |
| Warranty Description | Lifetime |
| Other details | |
| Magnification Minimum | 1x |
| Magnification Maximum | 1x |
| Reticle Type | Circle-Dot |
| Night vision | No |
| Thread Type | Weaver #322-2048 |
| Product Style | Red Reticle |
| Item Type Name | Shooting Sight |
Closest rivals on specs
EOTECH EFLX Mini Reflex Sight- Item Weight 0.11 vs 0.09 pounds (+22%)
Frequently asked questions
What happens if the battery dies?
The solar failsafe powers the reticle from ambient light when the CR1632 battery runs out, per the listed specs.
Can the reticle circle be turned off?
Yes, the multi-reticle system lets you disable the 32 MOA circle and use just the 2 MOA dot.