Extended and Single Sided Mag Release for Large Frame FN Pistols
About this product
What is the Extended and Single Sided Mag Release for Large Frame FN Pistols?
The Extended and Single Sided Mag Release for Large Frame FN Pistols is a direct, drop-in replacement component machined from bar stock 4140 steel, designed to provide a more consistent and faster magazine change sequence compared to the factory part. This release specifically addresses the ergonomic and performance limitations inherent to the OEM magazine release on FN's large-frame pistols such as the FNX-45 and 509 Tactical. It is a purpose-built control interface, not a general accessory, intended for operators who prioritize repeatable hand position and tactile feedback during reloads under time constraints.
What is the Extended and Single Sided Mag Release for Large Frame FN Pistols used for?
This release is used to replace the factory magazine button to standardize reload mechanics and reduce manipulation error during high-stress or competitive shooting sequences. Its primary function is to extend the button face approximately 0.185 inches further into the frame, decreasing the distance your shooting-hand thumb must travel for a positive engagement. The serrated, angled face provides tactile purchase even with wet or gloved hands, which directly impacts the consistency of magazine ejection. For duty or competition use, this translates to a marginal but critical reduction in reload time, often shaving 0.2–0.3 seconds from the standard release-to-seat cycle.
How does the Extended and Single Sided Mag Release for Large Frame FN Pistols compare to Apex Tactical's equivalent?
This release differs from the Apex Tactical Extended Mag Release for FN pistols in its material hardness and dimensional specification. While both are machined from bar stock steel, the Break Point Armory component undergoes a secondary cryogenic stabilization process after heat treatment to achieve a Rockwell C hardness of 50–52 HRC, compared to Apex's typical 48–50 HRC range. This results in superior long-term wear resistance at the engagement notch. Dimensionally, the face of our release is 0.015 inches wider and features 30 LPI serrations versus the more common 24 LPI, providing a more aggressive and less ambiguous grip surface.
What does it weigh and what are the dimensions?
The component weighs 21 grams, with a button diameter of 0.375 inches and a face-to-axle reach of 0.425 inches. Total length from the rear of the engagement arm to the front of the button face is 0.855 inches, making it a direct, no-modification fit within the standard magazine well recess. The extended portion projects 0.185 inches beyond the factory-frame plane, which is the critical measurement for thumb reach reduction. For reference, this is a 12% increase in surface exposure over the stock FN 509 Tactical release. These precise dimensions ensure compatibility without interfering with standard-issue holsters from Safariland or Blackhawk.
Who is this NOT for?
This component is not for casual recreational shooters or anyone who does not carry their FN pistol in a duty or competition context where reload speed is a measured performance metric. The extended profile can increase the likelihood of an unintentional magazine drop if the user employs an improper or inconsistent grip, particularly on smaller-handed shooters. It is also not recommended for shooters who primarily use their support hand for magazine release manipulation, as the design is uni-directional and optimized for primary-hand thumb activation.
What's in the box?
The box contains one magazine release, a 0.050-inch hex key for the set screw, and a single-page installation protocol. No additional springs, pins, or tools are included or required, as this is a true drop-in part designed to use the factory spring and detent. The accompanying hex key is torque-rated and correctly sized to prevent damage to the 6-32 set screw during the approximately 5-minute installation process. For complex installations requiring frame fixtures, we recommend consulting our 1911 Ejector Pin Fixture guide for principles of secure bench work.
Is the Extended and Single Sided Mag Release for Large Frame FN Pistols worth it at $75?
At $75, this release is worth the investment for competitive shooters in USPSA or IDPA, and for duty personnel whose protocol prioritizes weapon-system reliability over absolute cost. The price reflects the material specification (4140 steel, cryogenic treatment, black oxide finish) and the minimal but precise dimensional increase that yields a tangible performance return. For a shooter logging 15,000 rounds annually, the component amortizes to a negligible cost per round while directly addressing a known control weakness. It represents a higher initial outlay than a simple polymer paddle extender, but offers a permanent, durable solution. It complements but does not replace the fundamental training value of our Action Enhancement Kit for CZ 75 B (decocker models only), which focuses on internal trigger geometry.
Specs at a glance
Video review
Pros & cons
What works
- Extends 0.185" beyond frame plane—reduces thumb travel distance by 25% over factory.
- 21-gram weight matches OEM component—zero added mass or balance shift.
- 30 LPI serrations on a 0.375" diameter face provide positive grip with gloves.
- 50–52 HRC after cryogenic treatment ensures wear resistance beyond 20,000 cycles.
Trade-offs
- Uni-directional design only—cannot be configured for ambidextrous or support-hand use.
- Black oxide finish will show holster wear on leading edge within first 500 draws.
- No left-hand model exists—right-hand shooters only.
- Potential for accidental engagement with inconsistent high-thumb grips.
Expert review
Key attributes
| Material | 4140 Steel, Heat Treated & Cryo Stabilized |
| Finish | Black Oxide |
| Hardness | 50–52 HRC |
| Button Diameter | 0.375 in |
| Extension Length | 0.185 in |
| Total Weight | 21 g |
| Activation | Single Side (Right Hand) |
| Compatibility | FN Large Frame (FNX-9, FNX-45, 509 Series) |
Frequently asked questions
- Is it compatible with an FN 509 Tactical?
- Yes, this release is a direct drop-in replacement for the FN 509, 509 Tactical, FNX-9, FNX-45, and all variants sharing the large-frame magazine release design. It uses the factory spring and detent. Installation time is typically 5 minutes with a provided 0.050-inch hex key.
- Does it fit a small-frame FN pistol like the FN 502?
- No. This release is dimensionally specific to the large-frame FN magazine release cavity and engagement geometry. It is 0.855 inches in total length and will not seat or function correctly in the small-frame models, which use a completely different magazine catch system.
- Can I return it if it doesn't fit my pistol?
- Returns are accepted within 30 days for uninstalled, undamaged components. Installed parts are not eligible for return due to potential wear or marring. For fitment verification, consult the detailed spec sheet on our product page or contact our support team with your exact FN model number.
- How long does standard shipping take?
- Domestic USPS First-Class shipping averages 3–5 business days from dispatch. Orders placed before 2 PM Central are typically packaged and shipped the same day. Tracking information is provided automatically upon label creation.
- Does this work with a Safariland 6390 RDS holster?
- Yes, the extended profile does not interfere with the standard-duty retention mechanisms of the Safariland 6390 series. The added 0.185-inch extension remains within the holster's molded channel, ensuring no binding or obstruction during the draw stroke. We have confirmed this fit with holsters produced after 2021.
- Is the black oxide finish durable?
- The black oxide finish provides a corrosion-resistant surface with a coefficient of friction suitable for a moving part. It is less wear-resistant than a DLC or nitride coating but is sufficient for the release's operating environment. You can expect minor finish wear on the high-contact edges after approximately 5,000 actuation cycles.