FN 509M MRD Features
The slide is optic-ready and serrated, finished in matte black for durability and stealth. The Holosun HS 407C red dot enhances fast target acquisition and low-light visibility, while the suppressor-height co-witness iron sights offer immediate backup aiming. The 4-inch barrel includes a recessed target crown to preserve accuracy and protect the muzzle.
The polymer frame includes an integrated Picatinny rail for tactical accessories and interchangeable backstraps for ergonomic customization. With a flat-face trigger offering a smooth, consistent pull, and ambidextrous controls, the FN 509M is built for adaptability. It ships with two 10-round magazines, making it compliant with magazine capacity limits while maintaining full-sized capability.
FN 509M MRD Specifications
- Manufacturer: FN
- Model: 509M
- Series: MRD w/ Optic
- Caliber: 9mm Luger
- Action: DAO (Double Action Only)
- Type: Semi-Auto Pistol
- Frame Size: Mid-Size
- Frame Finish: Matte Black
- Frame Material: Polymer
- Frame Description: Polymer Frame w/ Picatinny Rail
- Slide Finish: Matte Black
- Slide Description: Optic Ready / Serrated
- Slide Material: Steel
- Optic: Holosun HS 407C Red Dot
- Sights: Co-Witness Iron
- Sight Style: Contrast
- Sight Configuration: Suppressor Height Co-Witness
- Barrel Length: 4″
- Barrel Material: Steel
- Barrel Finish: Black
- Barrel Description: Recessed Crown
- Twist Rate: 1:10″ RH
- Capacity: 10 + 1
- Max Capacity: 10
- Includes: 2 Magazines
- Grips: Interchangeable Backstrap
- Trigger: Flat Face
- Safety Features: No Manual Safety
- Overall Length: 7.40″
- Height: 5.20″
- Width: 1.35″
- Weight: 26.50 oz
- Hand: Ambidextrous
| Barrel Length | 4 |
|---|---|
| Caliber | 9mm |
| Capacity | 10 |
| Condition | New in Box |
| Finish Per Color | Black |
| Frame Per Material | Polymer |
| Manufacturer | FN |
| Manufacturer Part Number | 66101931 |
| Model | 509M MRD |
| Type | Semi Auto Handguns |
| UPC | 845737018375 |
Frequently Asked Questions About This Product
Why buy FN 509M MRD 9mm 4" Barrel 10-Rounds w/ Holosun 407C from Miami Shooters Supply?
We’re a trusted firearms dealer offering fast shipping, competitive pricing, and 100% compliance with U.S. federal firearm laws. All orders ship from our licensed facility with full tracking and expert customer service.
Where can I buy FN 509M MRD 9mm 4" Barrel 10-Rounds w/ Holosun 407C?
You can purchase this item directly on our website and have it shipped to your local FFL dealer. You can also visit us in-store in Miami, Florida.
Is FN 509M MRD 9mm 4" Barrel 10-Rounds w/ Holosun 407C available now?
Availability is shown live on this page. If the “Add to Cart” button is visible, this item is currently in stock and ready to ship.
What category does this product belong to?
This product is listed under: HANDGUNS, Semi Auto Handguns.
What tags or features does this product have?
Key features and tags for this product include: HANDGUNS, Semi Auto Handguns.
Is this product legal in my state?
It is your responsibility to ensure this item is legal in your state or locality. We ship only to valid FFL dealers in compliance with U.S. laws. Always check your local regulations.
FFL Transfer & Firearms Laws for FN 509M MRD 9mm 4" Barrel 10-Rounds w/ Holosun 407C
All firearms, including the FN 509M MRD 9mm 4" Barrel 10-Rounds w/ Holosun 407C, must be shipped to a licensed Federal Firearms License (FFL) dealer. You will be required to complete a background check and any necessary paperwork before taking possession.
How It Works
- Place your order online.
- Provide your preferred FFL dealer information.
- We ship the firearm directly to your FFL.
- You complete the background check and pickup at the FFL.
Legal Compliance
We comply with all federal and state firearm laws. It is your responsibility to ensure the FN 509M MRD 9mm 4" Barrel 10-Rounds w/ Holosun 407C is legal in your state. Some states may have restrictions on certain firearm models or features.
Helpful Resources
Need assistance? Contact our Miami store for help with FFL transfers and firearm compliance.
