Thread Protector 1/2 x 28 (9mm & .357SIG Barrel) Knurled Thick Spiral in Red

Keep your muzzle threads clean, protected, and looking sharp with this Thread Protector 1/2 x 28 for 9mm & .357SIG barrels. This essential Glock part is a simple, durable cap that screws directly onto your threaded barrel to shield the precision threads from impact damage, dirt, and debris when a muzzle device is not installed. It’s a must-have for any owner of a threaded Glock barrel who wants to preserve their firearm’s functionality and maintain a finished look at the range or in the safe. Miami Shooters Supply delivers this critical component with the fast shipping you expect.

Key Features

• Precision 1/2×28 thread pitch matches standard 9mm and .357 SIG threaded barrels.
• Aggressive knurled thick spiral pattern provides a positive, non-slip grip for easy hand-tightening and removal.
• Durable anodized aluminum construction offers a lightweight yet strong shield for your barrel threads.
• Vibrant red anodized finish ensures high visibility for quick identification and a custom accent.
• Compact, low-profile design maintains the pistol’s holster-friendly silhouette.
• Engineered for a precise, secure fit that stays in place under recoil and routine handling.

Built For

This thread protector is built for the practical Glock owner who uses their pistol with and without a muzzle device like a compensator or suppressor. It’s ideal for range-goers, competitors, and concealed carriers who need reliable thread protection without adding bulk. Whether you’re swapping between configurations or storing your firearm, this part ensures your barrel’s threads remain in perfect condition.

Specifications

• Thread Pitch: 1/2 x 28 RH
• Caliber Compatibility: 9mm, .357 SIG
• Material: 6061 Aluminum with Type III Hard Anodized Finish
• Color: Red
• Finish: Anodized
• Design: Knurled Thick Spiral

FAQ

Will this fit my Glock 19 with a factory threaded barrel?
Yes. If your Glock 19 (or other 9mm/.357 SIG model) has a standard 1/2×28 threaded muzzle, this protector is designed to fit it directly.

Does it require a wrench or tools to install?
No. The deep knurling allows you to securely install and remove it by hand. Simply screw it on until it is snug against the barrel shoulder.

Is the red finish durable?
Yes. The hard anodized Type III finish is highly resistant to wear, corrosion, and solvents, making it both a functional and long-lasting Glock part.