Disassembly Fixture for FN 509/FNS-C

Description

Working on an FN 509 or FNS Compact in Arizona’s dust and heat? Then this $25 disassembly fixture is the most practical addition you can make to your workbench. Designed and machined right here in Phoenix, AZ, it solves the single hardest step of the FN disassembly process: removing the unlocking block pin.

That pin is notorious for being stubborn, especially after exposure to high temperatures, sand, and carbon fouling. This fixture holds your FN 509 or FNS Compact frame securely and precisely locates a pin punch directly over the unlocking block pin. No more slipping punches, no more marred frames, no more frustration in the middle of a cleaning or repair job.

Real-world benefits for Arizona shooters:

• Suppressor-friendly design: Keeps the frame stable so you can work around your suppressor-height sights or aftermarket slide components without extra hassle.
• Heat and dust tough: Built from solid steel, this fixture won’t warp or degrade in your garage, shop, or range-side bench. It can handle the heat of a Phoenix summer without a problem.
• Works on a solid surface: Drop it in a vise, on an anvil, or on a heavy workbench over a leg. That’s where it performs best. Not your kitchen table or countertop — those surfaces absorb the impact and make the job harder.
• 100% made in the USA: Machined right in Phoenix, AZ. No overseas compromises. It’s built for the conditions we shoot in.

Specs & fitment:

• Compatible with FN 509 (all variants including 509C, 509T, 509 MRD) and FNS Compact.
• Precisely machined to accept the frame and align a 3/16” or 5mm punch with the front unlocking block pin axis.
• Use on a solid, non-marring surface — a vise anvil, concrete floor, or extremely solid workbench over a table leg. Do not use on kitchen tables, countertops, or any surface that flexes.
• Does not correct a pin that has already been damaged (face not flat) from prior attempts. If your pin head is deformed, you will need to dress it flat before using the fixture.
• No guarantee that this fixture will prevent frame damage — but it dramatically reduces the risk compared to free-handing a punch or using makeshift supports.