# FN 509 Midsize - Precision 9mm Striker-Fired Pistol

**Brand:** FN Herstal
**Category:** Mid-Size Handguns
**Caliber:** 9mm

## Specifications

- **Caliber:** 9mm
- **Barrel Length:** 4"
- **Capacity:** 10 rounds
- **Finish:** Black
- **Weight:** 26.5 oz
- **Overall Length:** 7.4"
- **UPC:** 845737010027
- **SKU:** UCEt9uIuZ

## Description

The FN 509 Midsize is a striker-fired 9mm pistol built around a cold hammer-forged barrel, polymer frame, and matte black stainless slide. It runs without a manual safety, relying on a consistent DAO trigger pull of 5.5 to 7.5 pounds.

### Key Specifications
- **Brand:** FN
- **Model:** 509 Midsize
- **Caliber:** 9MM Luger (9x19 Para)
- **Action:** Striker Fired (DAO)
- **Capacity:** 10+1 rounds
- **Barrel Length:** 4 inches
- **Weight:** 26.50 oz
- **Frame Material:** Polymer with Matte Black Finish
- **Slide Description:** Matte Black Stainless Steel
- **Safety Features:** No manual safety
- **Sights Type:** Fixed 3-Dot Luminescent

### Detailed Features
The cold hammer-forged barrel improves durability and contributes to consistent shot-to-shot accuracy. Interchangeable backstraps let shooters fit the grip to their hand size, and the aggressive texture holds well under sweat or gloves. The three-dot luminescent sight system works in low light without requiring batteries or additional hardware.

### Usage Scenarios
1. **Home Defense**: 10+1 capacity and controllable recoil make it a practical choice for defensive use.
2. **Sport Shooting**: Consistent trigger and balanced weight support accurate work on the range.
3. **Everyday Carry**: The midsize format conceals reasonably well for shooters who want a full-featured gun rather than a micro-compact.

## Frequently Asked Questions

**Q: What caliber is the FN 509?**

A: The FN 509 Midsize is chambered in 9mm Luger (9x19 Para).

**Q: Who makes the FN 509?**

A: The FN 509 is made by FN Herstal.

**Q: What type of firearm is the FN 509?**

A: It is a mid-size striker-fired pistol with a polymer frame and matte black stainless steel slide.

**Q: What is the barrel length of the FN 509?**

A: The FN 509 Midsize has a 4-inch barrel.

**Q: How many rounds does the FN 509 hold?**

A: It has a 10+1 capacity.

**Q: Does the FN 509 have a manual safety?**

A: No, the FN 509 Midsize ships without a manual safety. It relies on a consistent DAO trigger pull.

**Q: Where can I buy the FN 509?**

A: Compare current vendor offers on this page.

## What Reviewers Say

*Quoted verbatim from YouTube reviews. Each link opens the video at the moment quoted.*

> It takes a lot to impress me away from a Glock. Not necessarily away from it but to impress me in a firearm.
>
> — [hickok45](https://www.youtube.com/watch?v=fv-Hw6VUPcE&t=76s)

> It's hard to find people that badmouth these things.
>
> — [hickok45](https://www.youtube.com/watch?v=fv-Hw6VUPcE&t=811s)

> Probably would be the number one choice of these three as a carry gun.
>
> — [hickok45](https://www.youtube.com/watch?v=fv-Hw6VUPcE&t=661s)

> I can't imagine really wanting or needing one bigger than that for just civilian carry or whatever.
>
> — [hickok45](https://www.youtube.com/watch?v=fv-Hw6VUPcE&t=672s)

## What Customers Say

*AI-generated insights from customer reviews*

The 509 Midsize draws praise for its ergonomics, accuracy, and build quality. The grip texture and interchangeable backstraps come up frequently as genuine functional advantages rather than marketing features. Shooters report tight groups at distance and consistent reliability across different ammunition brands.

The main criticisms are the trigger and the size. Some owners find the trigger pull heavier and less crisp than competing striker-fired pistols, though most rate it as an improvement over older FN designs. The midsize format is wide enough that it draws comment from shooters who prefer something thinner for concealed carry. It's not a subcompact. Aftermarket support is narrower than for Glock or SIG platforms, which is a real consideration for customizers.

Pricing sits above budget options, and a segment of potential buyers finds that harder to justify against comparably-specced competitors. Those who do buy generally report satisfaction with performance relative to cost.

## Pricing

**4 offers available**

| Vendor | Price |
|--------|-------|
| Palmettostatearmory Com | $449.99 |
| Buds Gun Shop | $530.99 |
| Guns Com | $586.99 |
| Gritrsports Com | $615.99 |

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*Data from [GunsNation](https://gunsnation.com)*