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

This Thread Protector 1/2 x 28 in a knurled copper finish is a functional and aesthetic upgrade for your handgun’s muzzle. If you run a 9mm or .357SIG barrel with standard 1/2×28 threads, this protector keeps those threads clean from debris, impact damage, and corrosion. It’s a simple, essential piece for any shooter who uses a threaded barrel, whether for storage, dry fire, or when a muzzle device isn’t installed. The distinctive copper knurling provides both a secure grip for hand-tightening and a sharp, custom look that sets your Glock apart.

Key Features

• Precision machined from solid copper for durability and a premium finish.
• Knurled texture around the circumference for positive grip during installation and removal.
• Standard 1/2″-28 UNF threads ensure a perfect fit on common 9mm and .357 SIG pistol barrels.
• Protects critical barrel threads from dirt, dings, and cross-threading during transport or storage.
• Provides a finished, streamlined look to your muzzle when not using a compensator or suppressor.
• Designed and shipped directly from industry professionals at Miami Shooters Supply.

Built For

This protector is ideal for Glock owners with aftermarket threaded barrels who value both protection and style. It’s perfect for range use, safe storage, or for completing the look of your build when you don’t need a muzzle device attached. Competitive shooters and enthusiasts who maintain multiple configurations for their firearm will find this a reliable, high-quality component.

Specifications

• Thread Pitch: 1/2″ x 28 UNF
• Caliber Compatibility: 9mm & .357 SIG
• Material: Solid Copper
• Finish: Polished Copper, Knurled
• Brand: Miami Shooters Supply

FAQ

Will this thread protector fit my factory Glock barrel?
No, factory Glock barrels are not threaded. This protector is designed for aftermarket 9mm or .357 SIG barrels that have been manufactured with 1/2″x28 threads.

How do I install the thread protector?
Simply hand-tighten it onto the clean threads of your barrel. The knurling provides ample grip. Do not use tools to over-tighten, as this can damage the threads. A small amount of witness marking paint or a rubber o-ring can be used to help secure it if needed.