Disassembly Fixture for FN 509/FNS-C

Description

If you own an FN 509 or FNS Compact, you already know the hardest part of a full strip is getting that front unlocking block pin out. Without the right support, you’re fighting the frame flex, slipping punches, and risking damage to the polymer. This Apex Disassembly Fixture solves that problem directly.

Machined from solid steel right here in Phoenix, AZ, this fixture holds your pistol frame rigidly in place. It positions a pin punch exactly where it needs to go so you can drive out the stubborn unlocking block pin with one clean strike. No more wrestling with the frame on a towel, no more marred slide rails, and no more lost time.

Key benefits for your workbench:

• Eliminates guesswork – The fixture locates the punch perfectly, so you don’t have to “eyeball” the pin angle. That means less wear on your frame and fewer broken punches.
• Saves frustration – The unlocking block pin is the single tightest interference fit on these pistols. This tool turns a 20-minute battle into a 30-second job.
• Works for both models – Compatible with the full-size FN 509 and the FNS Compact. No modifications needed.
• Built for a vise or solid surface – Drop it in a bench vise, set it on a concrete floor, or use a heavy workbench over a leg. The fixture itself is stable and heavy enough to stay put.
• 100% USA-made – Cut and finished in Phoenix, AZ. No overseas plastic or pot metal here.

Specs and fitment:
The fixture is precision-machined to index off the frame’s dust cover, trigger guard, and grip profile. It works specifically with the FN 509 (all variants) and FNS Compact. The integrated punch guide is sized for a standard 3/32” roll pin punch, but you can use any punch that fits the channel.

Important usage notes:
This tool must be used on a solid, stable surface. A vise, anvil, concrete floor, or a heavy workbench positioned directly over a leg works fine. Do not use it on a kitchen table, countertop, hollow-core desk, or any surface that flexes. If the surface gives, the tool can’t support the frame properly, and you risk cracking the polymer or bending the pin.

One more thing about damaged pins:
If your front unlocking block pin has already been chewed up (mushroomed, peened,