Heckler and Koch (HK USA) Thread Cap Hk45/45c usp45/45c

If you're running an HK45, HK45C, USP45, or USP45C and don't have a suppressor or muzzle device mounted, a quality thread protector belongs in your kit. The Heckler & Koch thread cap for these pistols is engineered to shield the muzzle threads from damage, debris, and corrosion when your gun is in the safe or on the range without an accessory attached. It's a simple piece with real purpose—protecting the precision-cut threads and crown that are essential for reliable suppressor or muzzle brake performance down the road.

HK designed this cap specifically for the HK45, HK45C, USP45, and USP45C platform, so it seats true and stays put without looseness or rattle. The left-hand 16x1mm thread pitch matches HK's factory specification, ensuring a proper fit every time. It's the kind of small maintenance accessory that prevents big headaches—cross-threading or debris in the threads can mean a trip to the gunsmith or a suppressor that won't mount correctly.

Whether you're a competition shooter, duty-focused operator, or serious handgun hunter, keeping your threads clean and undamaged is part of responsible firearm ownership. This HK thread cap does exactly what it should: protects when you're not running a muzzle device, then gets out of the way when you're ready to add a suppressor or other tactical attachment.

Key Features

• OEM Heckler & Koch design for perfect fit and reliability
• Protects muzzle threads and crown from damage and contamination
• Left-hand 16x1mm thread pitch—no guessing or adapters
• Compact, lightweight design for easy carry and storage

Specifications

Frequently Asked Questions

Will this thread cap fit my HK45 or USP45?

Yes, this cap is designed for HK45, HK45C, USP45, and USP45C pistols with the correct left-hand 16x1mm thread pitch. It will not fit the Mark 23. If you have one of the compatible models, this cap will thread on securely without modifications.

Can I use this with a suppressor or muzzle device installed?

No—this is a thread protector for when you're not running a suppressor or other muzzle attachment. It protects the threads between uses, then you remove it to mount your accessory.

Why protect the muzzle threads?

The threads on your barrel are precision-cut and essential for secure suppressor or muzzle device mounting. Dirt, debris, or accidental damage to the threads can prevent proper fitment, cause reliability issues, or require expensive repairs. A simple thread cap prevents all of that.

Is this an official HK part?

Yes—this is genuine Heckler & Koch equipment, engineered to HK's specifications for your pistol.