The FN 509 Defender 9mm - Black Steel, 10+1 Capacity, Dual Action Pistol is a 9mm full size handguns from FN Herstal. It is available from 1 vendor at $449.99.
Name: FN 509 Defender 9mm - Black Steel, 10+1 Capacity, Dual Action Pistol
Brand: FN Herstal
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The FN 509 is a double-action polymer-framed pistol chambered in 9mm Luger. At 7.4 inches overall with a 4.25-inch barrel and a 10+1 capacity, it sits in the full-size service pistol class. The polymer frame keeps weight manageable, and the interchan...
The FN 509 is a double-action polymer-framed pistol chambered in 9mm Luger. At 7.4 inches overall with a 4.25-inch barrel and a 10+1 capacity, it sits in the full-size service pistol class. The polymer frame keeps weight manageable, and the interchangeable backstraps let you adjust grip size without aftermarket parts.
The double-action trigger runs 5.5 to 7.5 lbs, a wider range than striker-fired competition, reflecting the DA mechanism's travel characteristics. The fixed 3-dot sight system is functional and common enough that aftermarket options are easy to find if you want to upgrade. The black steel slide over polymer frame is a proven combination for service use: corrosion-resistant enough for regular carry, light enough for all-day wear.
Interchangeable backstraps mean one pistol can fit a range of hand sizes without swapping the grip entirely, a practical feature if multiple people share the gun or if you want a different feel for different roles.
The FN 509 Defender generates mostly positive feedback with a few consistent criticisms. Build quality is the first thing people comment on. The fit between slide and frame is solid, and FN's manufacturing reputation holds up on this model.
Reliability gets good marks across different ammunition, including cheaper range rounds. The 9mm Luger caliber keeps recoil light enough that follow-up shots are straightforward. The fixed 3-dot sights are serviceable but not a standout feature; upgrading them is a common first modification.
Capacity is a sore spot for some buyers. A 10+1 limit on a full-size 9mm is below what competitors offer in the same size class, and that gap shows up in most comparison discussions. The trigger pull range (5.5 to 7.5 lbs) gets mixed reviews. Some shooters find the DA feel intuitive, others prefer the consistency of a striker. Grip sizing is generally comfortable, though shooters with larger hands sometimes find it slightly snug. The aftermarket for holsters, sights, and accessories is solid, which helps when buyers want to customize.
AI-generated insights derived from customer reviews and discussions on popular gun-enthusiast forums.
Category: Full Size Handguns
Caliber: 9mm
Barrel Length: 4"
Capacity: 10 rounds
UPC: 845737009533
SKU: UCEt9uImb
The FN 509 is a double-action polymer-framed pistol chambered in 9mm Luger. At 7.4 inches overall with a 4.25-inch barrel and a 10+1 capacity, it sits in the full-size service pistol class. The polymer frame keeps weight manageable, and the interchangeable backstraps let you adjust grip size without aftermarket parts.
The double-action trigger runs 5.5 to 7.5 lbs, a wider range than striker-fired competition, reflecting the DA mechanism's travel characteristics. The fixed 3-dot sight system is functional and common enough that aftermarket options are easy to find if you want to upgrade. The black steel slide over polymer frame is a proven combination for service use: corrosion-resistant enough for regular carry, light enough for all-day wear.
Interchangeable backstraps mean one pistol can fit a range of hand sizes without swapping the grip entirely, a practical feature if multiple people share the gun or if you want a different feel for different roles.
| Caliber | 9mm |
| Capacity | 10 rounds |
| Barrel length | 4" |
| Overall length | 7.4" |
| Action | Double Action |
| Finish | Black |
| Sights | Fixed 3-Dot |
AI-generated insights derived from customer reviews and discussions on popular gun-enthusiast forums.
The FN 509 Defender generates mostly positive feedback with a few consistent criticisms. Build quality is the first thing people comment on. The fit between slide and frame is solid, and FN's manufacturing reputation holds up on this model.
Reliability gets good marks across different ammunition, including cheaper range rounds. The 9mm Luger caliber keeps recoil light enough that follow-up shots are straightforward. The fixed 3-dot sights are serviceable but not a standout feature; upgrading them is a common first modification.
Capacity is a sore spot for some buyers. A 10+1 limit on a full-size 9mm is below what competitors offer in the same size class, and that gap shows up in most comparison discussions. The trigger pull range (5.5 to 7.5 lbs) gets mixed reviews. Some shooters find the DA feel intuitive, others prefer the consistency of a striker. Grip sizing is generally comfortable, though shooters with larger hands sometimes find it slightly snug. The aftermarket for holsters, sights, and accessories is solid, which helps when buyers want to customize.
Price Range: $449.99 - $449.99
| Vendor | Price | Condition | Link |
|---|---|---|---|
| Guns Com | $449.99 | Used | Buy Now |
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