Hk Hk45C 4.57 Threaded Barrel

The HK45C 4.57 threaded barrel is a direct drop-in replacement barrel built for the HK45 Compact platform. If you're running an HK45 Compact and want to thread your muzzle for a suppressor, compensator, or other muzzle device, this barrel gives you that option without requiring gunsmithing or extensive modification. It's the straightforward path to adding suppressors or muzzle accessories to your compact carry or duty pistol.

This is a precision-engineered factory H&K part, so fitment and reliability are guaranteed—drop it in and you're done. The left-handed thread pitch (16mm x 1mm) is standard for H&K pistols and works with most common muzzle devices designed for their platform. Whether you're building a suppressed host or simply want the flexibility of threaded muzzle options, this barrel delivers the performance and durability H&K is known for.

Important: this barrel is engineered exclusively for the HK45 Compact. It will not fit the full-size HK45 or any USP models, so verify your platform before ordering.

Key Features

• Direct drop-in replacement for HK45 Compact—no modifications needed
• Threaded muzzle (16mm x 1mm left-handed) ready for suppressors and muzzle devices
• Factory H&K precision and reliability
• 4.57-inch length matches HK45 Compact specifications

Specifications

Frequently Asked Questions

Will this barrel fit my HK45 or USP?

No. This barrel is designed exclusively for the HK45 Compact. It will not fit the full-size HK45 or any USP model variants. Verify your exact pistol model before purchasing.

Is this barrel ready to use out of the box?

Yes. It's a direct drop-in replacement, so installation requires no gunsmithing or modifications—just standard barrel swap procedures for your HK45 Compact.

What muzzle devices will fit this threaded barrel?

The 16mm x 1mm left-handed thread pitch is H&K standard. Most suppressors and muzzle devices designed for H&K pistols will fit, but always verify compatibility with your specific device before purchasing.