Description
If you've got a threaded 9mm barrel, keeping those threads in good shape matters. The Rival Arms Thread Protector does exactly what its name says: protects the crown and threads of your barrel when you're not running a suppressor or compensator.
What Makes This Thread Protector Stand Out
Rival Arms machines this protector from 416R stainless steel billet, which means superior corrosion resistance and durability compared to cheaper alternatives. The black PVD finish looks clean and professional while holding up to regular use. It's CNC-machined for precision fit, so you're getting consistent quality from a manufacturer known for quality pistol parts.
Compatible with Your Setup
The 1/2-28 thread pitch is the standard for 9mm pistol barrels, which makes this protector compatible with most aftermarket suppressors and compensators. You can thread it on when you're not running other muzzle devices, or swap it out whenever you need to. It works with Rival Arms barrels or any other 9mm barrel that uses 1/2-28 threads.
Lightweight and Simple
This isn't a complicated part. It threads on, it stays put, and it keeps your barrel threads protected from dust, carbon buildup, and accidental dings. No O-ring hassles, no excess weight. It's the kind of thing you install once and forget about until you need to switch to a suppressor or compensator.
Key Specifications
- Manufacturer Part Number: RARA300001A
- UPC: 788130026670
- Caliber: 9mm Luger
- Thread Pattern: 1/2-28 TPI
- Material: 416R Stainless Steel
- Finish: Black PVD
- Construction Method: CNC-Machined from Billet
- Manufacturer: Rival Arms
What’s Included
- Rival Arms 9mm Thread Protector, 1/2-28 TPI
Frequently Asked Questions
Will this thread protector fit my barrel?
It works with any 9mm barrel that uses 1/2-28 thread pitch, which is the standard for 9mm pistol barrels. This includes Rival Arms barrels and most aftermarket threaded pistol barrels on the market. If your barrel is threaded 1/2-28, this protector will fit.
Can I use this with a suppressor or compensator?
No, the thread protector is meant to be used when you're not running other muzzle devices. It threads onto your barrel to protect the crown and threads. When you want to install a suppressor or compensator, you simply unscrew the protector and replace it with your muzzle device.
Why is 416R stainless steel better than standard stainless?
416R stainless is a free-cutting alloy that machines cleanly and precisely, allowing for tighter tolerances. It also provides excellent corrosion resistance and durability, which is why it's commonly used in precision firearm components. The black PVD finish adds another layer of protection against rust and wear.
Is there an O-ring included with this thread protector?
This Rival Arms protector is a simple design without an integrated O-ring locking system. It threads on and stays in place through the fit of the threads. Some shooters add their own O-ring if they prefer extra retention, but it's not required for basic protection.



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