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Thread Protector

Combat Armory stocks 63 thread protector options for 1/2x28 threaded barrels, the standard pitch for 9mm and .357 SIG pistol barrels, including 9mm conversion threaded barrels. Prices run $4.99 to $9.99, and every protector is machined to cover exposed threads when no muzzle device is installed on the barrel.

Styles include Knurled, Hex, Smooth, Straight Fluted and Thick Spiral, such as the Combat Armory Thread Protector 1/2 x 28 (9mm & .357SIG Barrel) Knurled in Black. Colors go beyond black to Gold, Copper, Violet, Red, Rose Gold and a Naked stainless finish, so you can match the protector to your barrel or slide finish.

Thread protectors are a low-cost way to keep threads clean and protected during storage or between range trips. Confirm your barrel's thread pitch is 1/2x28 before ordering, since larger-caliber threaded barrels such as .45 ACP use a different pitch entirely.

63 products

Thread Protector questions

What thread pitch do these protectors fit?

All thread protectors in this section are sized 1/2x28, which fits 9mm and .357 SIG threaded pistol barrels, including 9mm conversion threaded barrels commonly used on Glock-pattern pistols and similar handguns.

Will these fit a .45 ACP threaded barrel?

No. .45 ACP threaded barrels typically use .578x28 threads, a larger pitch than the 1/2x28 protectors sold in this section, so a .45 ACP owner will need a different size protector.

What styles and colors are available?

Styles include Knurled, Hex, Smooth, Straight Fluted, Thick Spiral and Coil, in colors from Black and Gold to Copper, Violet, Red and a Naked stainless finish, giving plenty of ways to match your build.

How fast do thread protector orders ship?

Orders ship within 24 hours of purchase. Unused thread protectors can be returned within 30 days of delivery, and orders over $99 qualify for free shipping within the continental United States.