This is a 1/2×28 thread protector designed specifically for 9mm and .357SIG barrels, finished in a durable violet color. If you run a threaded Glock barrel and want to protect those crucial threads from impact, dirt, and debris when a muzzle device isn’t installed, this is the essential piece you need. It screws on securely to prevent damage and maintain the integrity of your barrel’s threading, ensuring your comp or suppressor mounts perfectly every time. The distinct hex profile provides a positive grip for easy hand-tightening with a wrench.
Key Features
- Precision machined from high-strength, heat-resistant 4140 steel for durability.
- Features a six-sided hex design for secure installation and removal with a standard wrench.
- Protects the delicate 1/2×28 threads on your barrel from physical damage and fouling.
- Violet PVD coating is both visually distinctive and highly resistant to wear, corrosion, and chipping.
- Hand-tighten to proper torque to maintain alignment and prevent walking off under fire.
- Maintains a clean, finished look on your handgun when not using a muzzle device.
Built For
This thread protector is ideal for Glock owners who alternate between a suppressed setup and standard carry or competition use. It’s a must-have for anyone who invests in a quality threaded barrel and understands that protecting that investment is a priority. The violet finish also allows for a unique personal touch on your build without sacrificing an ounce of functionality.
Specifications
- Thread Pitch: 1/2 inch x 28 TPI (UNEF)
- Caliber Compatibility: 9mm & .357SIG (for barrels with 1/2×28 threads)
- Material: 4140 Steel with PVD (Physical Vapor Deposition) Coating
- Finish: Violet
- Profile: Hex (6-sided)
FAQ
Will this fit my Glock 19 Gen 5 with a threaded barrel?
Yes, if your aftermarket Glock 19 barrel uses the standard 1/2×28 thread pattern common for 9mm, this thread protector will fit perfectly. It’s one of the most common Glock parts for threaded setups.
Can I use this with a crush washer or shims to time it?
No. Thread protectors are designed to be hand-tightened directly against the barrel shoulder. Using a crush washer or shims can misalign the protector and is unnecessary. Simply screw it on until it is firmly seated.


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