PROMAG FN 509 MAGAZINE - 9MM - 10 ROUND CAPACITY - 17 ROUND BODY - STEEL - BLUED
ProMag Industries
$35.69 - $39.69
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ProMag Industries
PROMAG FN 509 MAGAZINE - 9MM - 10 ROUND CAPACITY - 17 ROUND BODY - STEEL - BLUED
The ProMag FN 509 Magazine delivers reliable 9mm feeding performance in a California-compliant 10-round configuration, housed in a full-size 17-round body for a natural grip profile and seamless compatibility with your FN 509 pistol.
- California-compliant 10-round capacity in a standard 17-round magazine body
- Heat-treated steel construction with durable black oxide (blued) finish
- Precision-wound chrome silicon wire spring ensures consistent feeding
- Injection-molded follower reduces friction for smooth, reliable cycling
- Drop-free design for fast, positive magazine changes under pressure
- Made in the USA and backed by a lifetime manufacturer's defect guarantee
Who This Is For
This magazine is ideal for California residents and FN 509 owners in other restricted-capacity states who want a factory-profile magazine that maintains the full grip feel of the original firearm. It's a smart choice for range shooters, concealed carry permit holders, and home defense users who prioritize build quality, American craftsmanship, and long-term reliability without sacrificing the ergonomics of their full-size pistol.
Specifications
| Brand | ProMag Industries |
|---|---|
| Compatible Firearm | FN 509 (9mm) |
| Caliber | 9mm Luger |
| Capacity | 10 Rounds (Blocked) |
| Magazine Body Size | 17-Round Profile |
| Material | Heat-Treated Steel |
| Finish | Black Oxide (Blued) |
| Follower | Injection-Molded Polymer |
| Spring Material | Heat-Treated Chrome Silicon Wire |
| Country of Origin | USA |
| Warranty | Lifetime (Manufacturer Defects) |
Frequently Asked Questions
Will this magazine fit all FN 509 variants, including the 509 Compact and 509 Tactical?
This ProMag magazine is designed specifically for the standard FN 509 full-size pistol chambered in 9mm. While it may physically fit certain FN 509 variants, compatibility can vary — particularly with the 509 Compact, which uses a shorter grip frame. We recommend verifying fitment with your specific model before purchasing. The 17-round body profile is best suited for the standard full-size 509 frame.
Why does this magazine have a 17-round body if it only holds 10 rounds?
The magazine uses a standard 17-round body dimensions to maintain the original grip length and ergonomics of the FN 509, but is blocked internally to comply with California's 10-round magazine capacity limit. This means the magazine seats and handles identically to a standard-capacity magazine, giving you a natural feel without any awkward grip extensions or reduced-profile bodies.
Is this magazine legal to purchase in California?
Yes. This ProMag FN 509 magazine is blocked to a 10-round capacity, making it compliant with California's magazine capacity restrictions. It is sold through Goodland Guns specifically as a California-compliant option. As capacity laws can change, we always encourage customers to stay current with applicable state and local regulations regarding magazine ownership and use.
- Caliber:
- 9MM
- Capacity:
- 10/17 Round
- Color:
- Blued
- Follower Color:
- Black
- Type:
- Pistol Magazine
- CA Compliant:
- Yes
- Platform:
- 509
- Material:
- Steel
