The HK Thread Protector Cap (brand part number 970173) is a black steel thread cap sized for 40 caliber pistol barrels with an exposed HK-pattern muzzle thread. It threads directly onto the exposed threads to protect them from dings, dirt, and corrosion whenever you’re not running a suppressor or compensator on that barrel. Machined from steel and finished in black, it’s a simple, factory-correct way to keep a threaded HK barrel looking and functioning like new between range trips.

Key Specifications

• Machined from steel.
• Finished in black.
• Sized for .40 caliber pistol barrels.
• Threads onto exposed muzzle threads to protect them when not mounting a suppressor or compensator.
• Purpose-built for HK-pattern threaded barrels.

Frequently Asked Questions

What does a thread cap protect against? It shields exposed muzzle threads from dings, dirt, and corrosion when you’re not running a suppressor or compensator.

What caliber barrel does this fit? .40 caliber HK-pattern threaded barrels.

Buy the HK Thread Protector Cap for .40 Caliber Barrels – Black Steel

Keep your threaded HK barrel protected between range trips. Order it from our Heckler & Koch / H&K lineup, part of our handgun parts selection, at our Lubbock, Texas gun shop for fast, direct shipping.