Apex Grade Thread Protector for FN 545 & FN 510

Description

Protect the threads on your FN 545 Tactical or FN 510 Tactical with this purpose-built Apex Grade Thread Protector. Priced at $30, it’s a straightforward upgrade that keeps your barrel threads in good shape between suppressor use or when you’re carrying concealed. The captured O-ring is pre-installed and stays put when you remove the protector, so you won’t lose it at the range or in the field.

This protector screws directly onto the factory threaded barrel of the FN 545 and FN 510. Both pistols use a .578-28 TPI thread pitch. It also fits any other pistol barrel with the same .578-28 threads, as long as the shoulder-to-muzzle tip measurement is approximately .515 inches. That means if you’ve got a compatible barrel from another build, this protector will work there too.

The unique offset pentagon pattern gives it a clean, no-nonsense look that stands out from standard round protectors. It’s available in two finishes: Bead Blasted (white) for a matte, raw-metal appearance, or Armorlube (black) for a low-reflectivity coating that blends with most slide finishes. Both options are durable enough for regular handling and holster wear.

Key benefits for your setup:

• Thread protection – Prevents damage to your barrel threads when you’re not running a suppressor or compensator.
• O-ring stays in place – The captured O-ring remains inside the protector when you unscrew it, so you don’t have to fish it out or replace it.
• Distinctive look – The offset pentagon shape sets your pistol apart without adding bulk or snag points.
• Two finish options – Choose Bead Blasted for a bright, industrial look or Armorlube Black for a subdued, wear-resistant coating.
• Direct fit for FN 545/510 – No adapters or modifications needed. Screw it on and go.
• Works with other .578-28 barrels – If you have a barrel with the same thread pitch and a .515-inch shoulder-to-muzzle length, this protector fits.

Whether you’re a practical shooter running drills, a hunter keeping your barrel threads clean on a sidearm, or someone who carries concealed and wants to protect your threaded barrel during daily carry, this thread protector is a simple, reliable addition. It threads on smoothly, stays tight during use, and comes off easily when you’re ready to attach a can or compensator. At $30, it’s an affordable way to keep your FN