FN Extended Mag: Upgrade Your Capacity with OEM Reliability
Whether you’re heading to the range, carrying for personal defense, or preparing for competitive shooting, the FN extended mag is an easy and effective way to increase your firearm’s round capacity. Available for popular FN pistols like the FN 509, FN 510, and FN 545, these factory-made magazines give you more shots on target without sacrificing reliability.
What Is an FN Extended Mag?
An FN extended magazine is a high-capacity version of the standard FN pistol mag, offering increased round counts over the flush-fit models. Designed and manufactured by FN America, these mags are constructed with high-strength steel, corrosion-resistant coatings, and advanced spring systems to ensure smooth feeding and dependable performance.
Common Models Available:
- FN 509 Extended Magazines – Up to 24 rounds
- FN 510 Extended Magazines (10mm) – 22 rounds
- FN 545 Extended Magazines (.45 ACP) – 18 rounds
Benefits of Using an FN Extended Mag
- 🔫 Increased Capacity: More rounds before reloading—critical for defense or competition.
- ⚙️ Factory Reliability: OEM quality ensures compatibility and durability.
- 🎯 Improved Grip: Extended baseplates offer better control for larger hands.
- đźš« Less Frequent Reloading: Ideal for range days or home defense scenarios.
Where to Buy FN Extended Magazines
đź›’ FN America Official Store
Full range of OEM magazines, including extended models for the FN 509, 510, and 545.
đź›’ GunMag Warehouse
Often stocks extended mags for FN pistols at discounted prices.
đź›’ Primary Arms
Reliable source for genuine FN mags with quick shipping.
đź›’ Palmetto State Armory
Occasionally bundles extended magazines with FN pistol purchases.
FN Extended Mag Options by Pistol
đź”· FN 509
- 17-Round (Standard)
- 24-Round (Extended) – Ideal for tactical use and competitions
🔶 FN 510 (10mm Auto)
- 15-Round (Standard)
- 22-Round (Extended) – Perfect for range or backcountry carry
âš« FN 545 (.45 ACP)
- 15-Round (Standard)
- 18-Round (Extended) – Adds capacity while maintaining ergonomic feel
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FAQ
1. Are FN extended mags reliable for self-defense?
Yes. FN extended magazines are factory-tested and made to the same standards as their standard mags. However, always test reliability with your specific ammo.
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2. Will a 24-round FN 509 mag work in a compact 509 model?
Yes, the extended mag will function, but it will protrude from the grip. Consider grip sleeves for a more seamless feel.
3. Are there aftermarket extended mags for FN pistols?
Yes, but FN OEM magazines are highly recommended for guaranteed fit and performance.
4. Can I use FN 510 or 545 mags in other FN pistols?
No. Due to caliber and frame differences, FN 510 (10mm) and FN 545 (.45 ACP) magazines are not interchangeable with other FN models.
5. Are FN extended mags legal everywhere?
No. Some states (e.g., CA, NY, NJ, MA) restrict magazine capacities. Always check local laws before purchasing or transporting.
Whether you’re looking to reduce reload time at the range or enhance your pistol’s defense capabilities, an FN extended mag offers extra rounds with the quality and dependability you’d expect from FN. Built to last and engineered for performance, it’s a must-have upgrade for any FN pistol owner.