Disassembly Fixture for FN 509/FNS-C
About this product
Answer Capsule
The disassembly fixture for FN 509/FNS-C from Apex is a shop-grade tool that locks your pistol frame securely in place so you can drive out the stubborn unlocking block pin without slipping or damaging your gun. At $25, it saves you time, frustration, and the cost of a gunsmith visit.
Specs
| Manufacturer | Apex Tactical Specialties |
|---|---|
| Model | FN Disassembly Fixture |
| Material | Steel with black oxide finish |
| Compatibility | FN 509 (all variants), FNS Compact |
| Finish | Black oxide |
| Weight | ~0.5 lb (per manufacturer specs) |
| Condition | New |
Key Features
- Precision Pin Alignment — The fixture guides your punch directly onto the unlocking block pin, so you hit it square every time. Why it matters: a misaligned strike can peen the pin face or mar your frame, turning a simple job into a repair.
- Solid-Surface Stability — Designed to sit on a vise anvil, concrete floor, or a workbench over a leg. Why it matters: a wobbly surface lets the frame flex, making the pin bind up; this fixture keeps everything rigid for a clean strike.
- Frame Protection — The steel body holds the polymer frame without scratching or cracking it. Why it matters: one slip with a punch on an unsupported frame can cost you $200+ in replacement parts.
- Compact, Bench-Ready Size — Small enough to toss in your range bag, heavy enough to stay put. Why it matters: you can use it at home, at the shop, or even on a tailgate (on a solid surface).
Who It’s For
This fixture is for anyone who owns an FN 509 or FNS Compact and wants to do their own maintenance without cussing at a stuck pin. It’s also for shop owners who work on FNs regularly and need a repeatable, safe way to break down customer guns. New gun owners will especially appreciate it — the unlocking block pin is the trickiest part of the takedown, and this tool makes it nearly foolproof.
Pros & Cons
- Pro: Affordable at $25 — less than a box of premium 9mm.
- Pro: Eliminates the guesswork of holding the frame steady while punching out a stubborn pin.
- Con: You must use it on a truly solid surface (vise, concrete, or bench leg). Using it on a kitchen table or countertop can damage the surface or the tool.
Comparison
| Feature | Apex Disassembly Fixture | Zev Technologies FN Grip Module | Lone Wolf Distributors FN Armorer Block |
|---|---|---|---|
| Price | $25 | $85 | $45 |
| Compatibility | FN 509, FNS Compact | FN 509 (grip module only) | FN 509, FNS, FNX |
| Material | Steel, black oxide | Polymer | Aluminum with steel insert |
| Pin Guide | Yes, machined slot | No (grip only) | Yes, but not as precise |
| Surface Requirement | Solid surface only | N/A (grip replacement) | Solid surface recommended |
FAQ
Will this work on an FN 509 Compact?
Yes. The fixture is designed to fit the FN 509 and FNS Compact frames. It works with all 509 variants, including the Compact, Tactical, and Midsize.
Do I need a vise to use this fixture?
No, but you need a solid surface. A vise anvil, concrete floor, or a workbench with a leg directly under it works best. Do not use it on a kitchen table, countertop, or any hollow surface — the fixture needs rigid support to work correctly.
What size punch do I use with this fixture?
A 1/8-inch roll pin punch is ideal. The fixture aligns the punch with the unlocking block pin, so any standard 1/8-inch punch will work. Just make sure the punch face is flat, not mushroomed.
Can I use this fixture for reassembly?
Yes. The fixture holds the frame steady while you install the unlocking block and drive the pin back in. It works for both disassembly and reassembly.
Is this the same as the Apex FN Armorer Block?
No. This is a dedicated disassembly fixture specifically for the unlocking block pin. The Apex armorer block is a larger, more expensive tool for full frame support. This fixture is a lower-cost alternative that focuses on the most difficult single step of the takedown.
Call to Action
Stop fighting that unlocking block pin. Add the Apex FN Disassembly Fixture to your cart today and make your next FN breakdown the easiest one yet.
✅ Nationwide delivery (all 50 states)
✅ Ships 1–2 business days
✅ 30-day returns
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See more in our FN Armorer’s Tools and FN Parts categories.
Last updated: April 2026