C&H Precision Adapter Plate for FN 509, 510, 545 to Holosun 509T (V4 MIL/LEO Steel)
Not Yet Rated | Write the First Review SKU: 222-C&H-FN509-509T-ST
UPC: 616943735345
MFG#: FN509-509T-ST

FN 509 / 510 / 545 V4 MIL/LEO Plate to Holosun 509T – Steel Adapter by C&H Precision

Upgrade your FN 509, FN 510, or FN 545 with a precision-milled steel adapter plate built to mount the Holosun 509T red dot — no guesswork, no compromise.

Whether you're running a duty pistol, concealed carry setup, or a tactical build, this V4 MIL/LEO optic plate gives you a rugged, direct-mount solution with the exact fit you expect from C&H Precision.

⚙️ Key Features & Specs

• ✅ Fits: FN 509, FN 510, FN 545

• ✅ Optic Supported: Holosun 509T only

• ✅ Plate Type: V4 MIL/LEO series

• ✅ Material: CNC-machined steel

• ✅ Finish: Black nitride for corrosion resistance

• ✅ Compatibility: Works with FN factory optics-ready slides

• ✅ Includes: Mounting screws, thread locker, and instructions

🔧 Note: Does not fit Holosun 509 ACSS Vulcan (due to footprint differences).

🔍 Why Choose This Holosun 509T Plate for Your FN Pistol?

Precision matters — especially when you're trusting your optic in real-world scenarios. This isn’t a generic universal plate. It’s a duty-rated steel adapter cut specifically to marry the 509T closed emitter to your FN pistol slide.

Whether you're mounting to:

• FN 509 Tactical for a carry setup

• FN 510 for high-caliber performance

• FN 545 for red dot precision
  — this plate delivers consistent zero, proper sight height, and long-term durability.

🧰 Installation Tips

To ensure a secure fit:

1. Dry fit the optic and plate before applying thread locker

2. Use blue Loctite on screws

3. Torque mounting screws to manufacturer-recommended specs (usually 12–15 in-lbs)

If your setup includes suppressor-height sights, this plate allows for a low co-witness with most standard height irons.

🛡️ Built by Professionals, For Professionals

This V4 MIL/LEO adapter plate is designed, machined, and quality-checked in the USA by C&H Precision, a family-owned shop trusted by law enforcement and competitive shooters alike.

🏆 Trusted by top-tier professionals in the field — and backed by our commitment to zero failure.

🔄 Compare to Other Plates

❓ Frequently Asked Questions (FAQ)

Will this plate fit the Holosun 509T ACSS Vulcan?

No. The ACSS Vulcan variant of the Holosun 509T uses a slightly different footprint and is not compatible with this plate.

Can I use this on an FN 509 Tactical?

Yes. As long as your FN 509 has an optics-ready slide, this adapter plate will allow direct mounting of the Holosun 509T.

Does it support co-witness with iron sights?

In most cases, yes. This plate is machined to keep the optic low, allowing for a lower-third co-witness with suppressor-height sights on most FN setups.

What comes in the box?

You’ll receive:

• 1x Steel V4 MIL/LEO adapter plate

• Mounting screws

• Thread locker

• Basic installation guide

Is this plate duty rated?

Yes. This is part of C&H Precision’s V4 MIL/LEO series, designed specifically for high-stress environments including law enforcement, military, and civilian defensive carry.

🛒 Ready to Mount the Holosun 509T on Your FN?

When you need a plate that just works — no wobble, no drift, and no excuses — trust the steel-built, duty-proven C&H V4 adapter for your FN 509, 510, or 545