The FN 509 FULLSIZE MRD [BLK] is a purpose-built option for anyone prioritizing reliability and sighting flexibility in a full-sized 9mm platform. Designed for duty-style carry and home defense, this pistol balances controllability, capacity, and an optics-ready setup to meet real-world needs.
FN 509 FULLSIZE MRD [BLK] Shop this product![FN 509 FULLSIZE MRD [BLK] full-size 9mm pistol, all-black with suppressor-height sights](https://images.guns.com/prod/2024/09/18/66eb3d4d1660603b6bbb6ef5fa0480f3f12f8ef578db8.jpg)
Performance and key features
At the heart of the FN 509 FULLSIZE MRD [BLK] is a 4.5-inch cold hammer-forged barrel machined from FN’s proprietary machine gun-grade stainless steel. That construction and the recessed target crown protect rifling and sustain accuracy over years of use. Chambered in 9mm, this platform delivers manageable recoil, consistent follow-up shots, and access to widely available defensive and practice ammunition.
Optics-ready and sighting
FN’s patented Low-Profile Optics-Mounting System gives the FN 509 FULLSIZE MRD [BLK] a dedicated optic footprint without sacrificing the slide’s integrity. The slide also ships with solid black suppressor-height sights to co-witness with a red dot and maintain sight picture when an optic is mounted. The optic cut accepts FN adapter plates, allowing quick installation of popular micro red dots.
Ergonomics, capacity, and durability
The full-sized slide and frame add mass that reduces muzzle rise and improves stability under recoil. Controls are arranged for intuitive handling in high-stress scenarios, and two 17-round magazines are included for generous on-board capacity. The all-black finish and robust slide design reflect FN’s emphasis on duty-grade durability.
View product details and pricing — priced at $743.99, the FN 509 FULLSIZE MRD [BLK] positions itself as a competitive option for those seeking a service-oriented 9mm with optics-ready capability.
Who should consider this pistol?
Operators, home defenders, and shooters who prefer a full-sized, optics-ready 9mm will find the FN 509 FULLSIZE MRD [BLK] compelling. It blends a hardened, cold hammer-forged barrel and recessed crown with a proven optics-mount system and high-capacity magazines—making it practical for serious defensive roles and regular range training.
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People Also Ask
What makes this product stand out from competitors?
This product offers superior quality and innovative features that set it apart in the market. Its design focuses on both performance and reliability, making it a top choice for professionals and enthusiasts alike.
Is this product suitable for beginners?
Yes, this product is designed with user-friendly features that make it accessible to beginners while still offering advanced capabilities for experienced users.
What warranty or support is available?
The product comes with comprehensive warranty coverage and excellent customer support to ensure your satisfaction and peace of mind.
How does this compare to similar products in its price range?
This product offers exceptional value for its price point, providing features and quality that typically cost significantly more in comparable alternatives.
What maintenance is required?
Minimal maintenance is required thanks to the product’s durable construction and quality materials. Regular cleaning and occasional inspections will keep it performing optimally.
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