If you’ve ever fought with the factory solid front unlocking block pin on your FN 509 or FNS-C, you know the drill—prying, tapping, and hoping you don’t mar the frame or lose your patience. This coil pin set is a simple, practical swap that makes takedown and reassembly noticeably easier. Instead of that stubborn solid pin, you get a spring-style coil pin that slides in and out with less fuss, so you can get back to what matters: shooting, cleaning, and inspecting your pistol without cussing at your workbench.
Will This Fit My Gun?
This pin set is a direct replacement for the factory front unlocking block pin in these specific FN models:
- FN 509 (all variants, including Compact, Tactical, and MRD)
- FN FNS-C (compact model)
It does not fit the full-size FNS or other FN pistol lines. If you’re unsure, drop us a line—we’re happy to help.
Key Features
- Coil pin design – Much easier to install and remove than the factory solid pin, especially for routine cleaning or inspection.
- Tested for durability – These pins have been live-fire tested through thousands of rounds without bending or walking out.
- Three pins per pack – Each pin is intended for single use (replace after removal), so you’ve got spares ready to go.
- Made in the USA – 100% domestic materials and manufacturing.
Install Difficulty: 2 out of 5
This is a straightforward swap for anyone comfortable field-stripping their FN pistol. You’ll need a punch (ideally 1/16″ or 3/32″) and a small hammer or mallet. Install the pin from left to right, and remove it from right to left—same direction as the factory pin. No special gunsmithing skills required, but take your time on the first go.
Frequently Asked Questions
Why use a coil pin instead of the factory solid pin?
The solid pin can be a bear to drive out, especially after it’s been seated for a while. The coil pin compresses slightly during installation, which makes it easier to remove later without damaging the frame or locking block. It’s a simple quality-of-life upgrade for anyone who cleans their gun regularly.
Can I reuse the same pin more than once?
We recommend using each pin only once. Coil pins are designed to compress during installation and can lose their tension if reused. That’s why this set comes with three pins—use one, and you’ve got two more for future swaps.
Will this pin affect trigger performance or safety?
No. This pin only replaces the front unlocking block pin—it doesn’t interact with the trigger mechanism or sear. Your trigger feel and safety function remain exactly as they were. It’s purely a convenience upgrade for disassembly and maintenance.
We ship all orders within one business day, and every pin set is backed by our no-hassle warranty. If it doesn’t fit or fails under normal use, we’ll make it right—no questions asked.
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