Thread Protector 1/2 x 28 (9mm & .357SIG Barrel)Thick Spiral in Radio Active Green

This Thread Protector 1/2 x 28 in Radio Active Green is a functional and highly visible cap for your pistol’s muzzle threads. If you run a 9mm or .357SIG barrel with the common 1/2×28 thread pattern, this protector is a must-have Glock part. It shields those critical threads from impact damage, debris, and corrosion when a muzzle device isn’t installed. The thick spiral design provides a superior grip for hand-tightening, and the vivid Radio Active Green finish ensures you’ll never lose it in your range bag.

Key Features

• Manufactured from durable, heat-resistant 4140 steel for long-term reliability.
• Features a deep, aggressive spiral pattern machined directly into the body for a positive, non-slip grip.
• Finished in a high-visibility Radio Active Green Cerakote that is both striking and corrosion-resistant.
• Precisely machined to 1/2×28 threads for a perfect, snug fit on compatible barrels.
• Designed with a thick, robust wall to fully protect muzzle threads from dings and cross-threading.
• Hand-tighten installation requires no tools and allows for quick removal when needed.

Built For

This thread protector is ideal for Glock owners who alternate between using a compensator or suppressor and running their pistol with a bare barrel. It’s also perfect for anyone who prioritizes protecting their barrel’s investment and wants a splash of unmistakable personalization on their firearm. The bright color makes it a favorite for those who appreciate unique Glock parts and enhanced visibility on the range.

Specifications

• Thread Pitch: 1/2″ x 28 TPI
• Caliber Compatibility: 9mm & .357SIG (for barrels with 1/2×28 threads)
• Material: 4140 Steel
• Finish: Radio Active Green Cerakote
• Design: Thick wall, spiral knurling

FAQ

Will this fit my Glock 19 barrel?
Yes, if your aftermarket Glock 19 barrel is threaded 1/2×28 for 9mm. Always verify your barrel’s thread pattern before ordering.

Is the finish durable?
Yes. The Cerakote ceramic coating is baked on for excellent adhesion, providing far greater wear and chemical resistance than standard paint or anodizing.