Precision, durability, and ergonomics are the pillars of a defensive sidearm that performs under pressure. For shooters who demand a reliable carry or duty pistol with subdued styling and enhanced handling, this model balances tactical features with manageable size and capacity.

FN 509 MIDSIZE TACTICAL [FDE] Shop this product

Overview

Built on the proven FNS Compact architecture by Fn, this Semi Auto Midsize pistol brings competition-grade barrel work and service-ready features to a shorter, more carryable package. At a retail price of $799.99, it offers value through quality materials and a thoughtful parts set tailored for defensive use.

Key features and what they mean on the range

The cold hammer-forged stainless-steel barrel with a recessed target crown and polished chamber and feed ramp improves durability and feeding reliability—critical when you need consistent function. The polymer frame features an enhanced grip texture for faster follow-up shots in adverse conditions and interchangeable backstraps (two FDE options included) to tune ergonomics.

Other engineered elements include a MIL-STD-1913 accessory rail for lights/lasers, suppressor-height night sights for co-witnessing optics, a fully ambidextrous slide stop and magazine release for true two-handed manipulation, an external extractor, a loaded chamber indicator, and a striker-fired double-action trigger with no manual safety. One 15-round and one 24-round magazine plus an FN logo soft pistol case are included; optic shown in some photos is not included.

Field performance and carry considerations

The Midsize series shortens the grip to reduce bulk for concealment or duty holster use while preserving a serviceable sight radius and magazine capacity. Enthusiasts and professionals will appreciate the balance between controllability and readiness—especially with the included 24-round magazine available for duty or range sessions. As a product from Fn, a manufacturer noted for durable service pistols, it fits well in both defensive and training applications.

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Final considerations for buyers

If you’re evaluating a Semi Auto Midsize for daily carry, duty, or focused training, the FN 509 MIDSIZE TACTICAL [FDE] delivers a strong package: robust barrel work, enhanced grip texture, ambidextrous controls, and the flexibility of interchangeable backstraps and a MIL-STD rail. Click through to the shop page to see current stock and purchase options—clicking any of the links will take you to the retailer’s product page where you can complete your order.

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