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

Description

This Unlocking Block Pin Set gives you three precision-made replacement pins for your FN 509 or FNS-C pistol. Designed specifically to replace the factory solid front unlocking block pin, each coil pin makes disassembly and reassembly noticeably easier—especially important if you clean your firearm regularly or swap parts for inspection. The coil construction slides in and out with less resistance than a solid pin, reducing the chance of marring your frame or finish during maintenance. These pins have been live-fire tested to hold up through thousands of rounds without bending or shifting, so you get reliable lock-up every time you press the trigger.

Each set includes three pins because we recommend using a fresh pin each time you remove the old one. This ensures consistent tension and fitment throughout the service life of your pistol. When reinstalling, push the pin from left to right (the same direction as the factory pin) and remove it from right to left. This simple directional rule keeps the unlocking block seated properly and avoids unnecessary wear on the frame channel. The pins are machined from high-grade USA-sourced steel and finished for corrosion resistance—critical for anyone carrying along Florida’s coast where salt air, humidity, and sweat can attack unprotected metal. You can count on these pins to resist rust and stay functional through hot, wet summers and daily concealed carry sweat exposure.

Key benefits for your carry pistol:

• Easier field stripping and cleaning – Coil pin design slides out without fighting a tight solid pin, making detailed cleaning of the locking block and frame less frustrating.
• Rust-resistant finish – Built to hold up against Florida’s coastal humidity and carry-related moisture, reducing the risk of corrosion inside your frame.
• Direct fit for FN 509 and FNS-C – No modification needed; drops in as a one-for-one replacement for the factory front locking block pin.
• Three pins per package – Use one, keep two spares. Replace with a fresh pin every time you remove it for cleaning or parts swaps.
• Tested for durability – Survived thousands of live-fire rounds without bending, walking out, or losing tension.
• 100% made in the USA – Machined and finished domestically using quality materials you can trust for a carry gun.

Fitment: FN 509 series (all models including compact, midsize, and full-size) and FN FNS-C compact pistols. Replaces the factory solid front unlocking block pin only; does not replace the rear locking block pin or other frame pins. Price: $15 for a set of three pins.