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Holosun 509t – Titanium Enclosed Red Dot Sight for Duty & Defense

The Holosun 509t is a top-tier, fully enclosed reflex red dot optic built for duty-grade performance in the harshest conditions. With a titanium housing, solar backup, and multi-reticle system, it delivers speed, accuracy, and reliability trusted by professionals, competitors, and tactical shooters alike.

At Mounts Plus, we stock the full line of 509t variants, mounts, and adapters—ready to ship with fast service and expert support.

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✅ Why Choose the Holosun 509t?

Built to exceed expectations, the 509t offers:

• 🛡️ Fully Enclosed Emitter – Sealed design prevents water, dirt, and debris from obscuring the lens

• 🧱 Titanium Housing – Unmatched durability and lightweight strength

• 🔋 50,000-Hour Battery Life – Runs on a single CR2032 cell with Shake Awake® power management

• ☀️ Solar Failsafe – Keeps your optic running even if the battery dies

• 🎯 Multi-Reticle System (MRS) – Switch between 2 MOA dot, 32 MOA circle, or both

Whether you carry for defense, train for competition, or serve on duty, the Holosun 509t X2 is built to meet your needs—no matter the mission.

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📦 Holosun 509t Specs & Variants

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⚙️ Feature Breakdown

• Window Size: 0.66 x 0.9 in

• Housing: Titanium, fully enclosed

• Footprint: Proprietary – requires adapter plate (e.g., Glock MOS, RMR-to-509T)

• Battery Type: CR2032 (included)

• Adjustment: 1 MOA per click

• Brightness Settings: 12 (10 daylight + 2 night vision)

• Mounting Options: Low Picatinny, 1/3 Co-Witness, RMR adapter

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🔄 Compare Holosun 509t vs EPS vs 508T

Feature	509T	EPS Carry	508T
Enclosure	Fully enclosed	Fully enclosed	Open reflex
Material	Titanium	Aluminum	Titanium
Mount	Proprietary	RMSc	RMR
Best Use	Tactical/Duty	CCW/Subcompacts	General use

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🛠️ Mount Compatibility

Use the Holosun 509t with the following platforms (with appropriate mounts or adapter plates):

• Glock MOS & Shadow Systems
• SIG P320 (with CH Precision or 509 adapter)
• CZ P-10, FN 509, H&K VP9
• AR-15 Picatinny rails with low or 1/3 co-witness mounts

Find adapter plates and co-witness mounts here to complete your setup.

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💬 Reviews from Real Shooters

“Absolutely love the 509t. Rock solid, never fogs, always ready. I trust it for daily carry.” – Tyler M.
“Perfect for duty use. I’ve beat on this optic hard, and it just keeps going.” – Officer L.J.
“Switched from an RMR. No regrets. The enclosed design is unbeatable in rough environments.” – Josh A.

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❓ Holosun 509t FAQ

Is the Holosun 509t good for concealed carry?

It's best for duty-sized handguns (e.g., Glock 19/17, P320) due to its size. For subcompacts, consider the Holosun EPS Carry.

How long does the battery last?

Up to 50,000 hours on a single CR2032 battery with Shake Awake® and Solar Failsafe backup.

Is the 509t night vision compatible?

Yes. It has 2 NV settings in its 12-position brightness adjustment system.

Can I mount this to an RMR footprint?

Not directly. You’ll need a 509T-to-RMR adapter plate available on this page.

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🛒 Shop Holosun 509t at Mounts Plus

Mounts Plus is your go-to source for Holosun optics and accessories:

✅ In-stock 509t X2 models (Red & Green Dot)
✅ Adapter plates and mounting solutions
✅ Fast U.S. shipping
✅ Expert technical support
✅ Trusted by shooters since 1994

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