Apex Grade Thread Protector for FN 545 & FN 510

If you’ve got an FN 545 Tactical or FN 510 Tactical with a factory threaded barrel, you know those threads are easy to ding up in a range bag or holster. This thread protector screws right onto the muzzle to keep the threads clean and undamaged between suppressor or compensator use. It’s a simple piece, but a missing or busted protector means you’re either chasing replacement parts or risking a cross-threaded can. This one solves that problem before it starts.

Will it fit my gun?

• FN 545 Tactical (factory threaded barrel)
• FN 510 Tactical (factory threaded barrel)
• Any pistol barrel with .578-28 TPI threads and approximately .515” from the shoulder to the muzzle tip

Key features

• Unique offset pentagon pattern – gives it a clean, non-round look that’s easy to grip with fingers or a tool
• Captured O-ring stays in place inside the protector when it’s off – no hunting for a lost rubber ring
• Two finish options: Bead Blasted (white) or Armorlube (black) – pick the one that matches your barrel
• Pre-installed O-ring keeps tension on the threads so it won’t walk off during firing

Install difficulty: 1 out of 5

Hand-tighten onto the barrel threads. That’s it. No tools needed. If you want it snug, a small wrench on the pentagon flats works, but hand tight is usually plenty. The O-ring does the rest.

Frequently asked questions

Will this fit my aftermarket threaded barrel?

It will fit any barrel with .578-28 TPI threads and roughly .515” of thread length from the shoulder to the muzzle. That’s a common spec for FN factory barrels and some aftermarket options. Measure your barrel’s thread length to be sure.

Does the O-ring stay in the protector when I take it off?

Yes. The O-ring is captured inside the protector, so it doesn’t fall out or get lost when you remove it to attach a suppressor or compensator. It stays put until you put the protector back on.

Which finish should I pick?

The Bead Blasted finish is a matte silver that matches a stainless or raw steel barrel. The Armorlube Black is a flat black coating that blends in with most factory black barrels. Both are durable and resist wear from regular handling.

Shipping & warranty: We ship same or next business day from our shop. This thread protector comes with our standard satisfaction guarantee – if it doesn’t fit your factory FN barrel, we’ll take it back. No hassle.