Unlocking Block Pin Set for FN 509 & FNS-C Pistols

Description

For FN 509 and FNS-C owners who handle their own maintenance, this three-pack of coil-style Unlocking Block Pins solves a persistent frustration with the factory solid pin. Priced at $15, it’s a simple upgrade that makes routine cleaning and part inspection noticeably easier.

The factory solid pin can be stubborn to drive out and reinstall, especially after carbon buildup. This coil pin replaces it with a design that slides in and out with less resistance—saving you time and hassle every time you break down your pistol. Despite the lighter installation effort, each pin is built to hold up under hard use. They’ve been test-fired through thousands of rounds without bending or walking out, so you get reliable lockup shot after shot.

Practical fitment details: These pins are a direct, drop-in replacement for the factory front unlocking block pin on the FN 509 (full-size, compact, and tactical models) and the FNS-C. No modification or fitting required. Install left to right, remove right to left—same direction as the factory pin. Each pin is intended for single-use: once removed, replace it with a fresh one from the pack. That’s exactly why you get three in the box—one for your current swap and spares for future maintenance cycles.

Real benefits for shooters and hunters:

• Faster cleaning cycles – Less time fighting with a stuck pin means more time at the range or in the field.
• Simplified inspection – Easier removal lets you check the unlocking block and trigger assembly for wear or debris without risking damage to the frame.
• No special tools needed – Use a standard punch and hammer; the coil design reduces the force required compared to the solid OEM part.
• Built for longevity – 100% made in the USA from high-quality materials, heat-treated to resist fatigue through thousands of rounds.
• Cost-effective maintenance – At $15 for three, you’re covered for multiple service intervals without buying single pins each time.

Whether you’re keeping your carry gun in top condition or doing a deep clean after a heavy range session, this pin set removes a common annoyance from the process. It’s a small, smart upgrade that pays off every time you pull the slide.