USP Compact

The HK USP Compact is the reduced-size member of the USP family, with separate 9mm, .40 S&W, and .45 ACP references. Its dimensions, barrel length, weight, and magazine configuration vary by caliber. This page provides neutral identification and specification information for comparing those configurations.

USP Compact specifications

• 9mm x 19: 6.81-inch length, 5.00-inch height, 1.38-inch width, 3.58-inch barrel, 5.31-inch sight radius, and 27.20-ounce weight without magazine.
• .40 S&W: 6.81-inch length, 5.00-inch height, 1.38-inch width, 3.58-inch barrel, 5.31-inch sight radius, and 27.52-ounce weight without magazine.
• .45 ACP: 7.09-inch length, 5.04-inch height, 1.38-inch width, 3.78-inch barrel, 5.63-inch sight radius, and 28.16-ounce weight without magazine.

Specifications are based on the official HK USP Compact reference. Available variants, trigger systems, magazine packages, and legal capacity limits may differ, so confirm the exact model and current manufacturer documentation.

USP variants and identification

The Compact uses a smaller frame and shorter barrel than the full-size USP. It is also distinct from the longer-barrel USP Tactical. Browse related models in the USP Series or return to HK Pistols.

Compatibility considerations

Frame size, caliber, barrel dimensions, trigger variant, magazine design, and manufacturer part number can affect compatibility. Do not assume that full-size USP, USP Compact, and USP Tactical components are interchangeable. Confirm the exact model and caliber or consult a qualified gunsmith.

Safety and professional service

This page is for identification and educational reference and does not provide firearm-modification instructions. Keep firearms secured from unauthorized access and unloaded during inspection. Follow the manufacturer’s manual and all applicable laws. Any regulated transfer must use the legally required licensed-dealer and eligibility process. Use a qualified professional for inspection or service and never disable or bypass a safety feature.

USP Compact questions

Which calibers are listed for the USP Compact?

The current manufacturer reference includes 9mm x 19, .40 S&W, and .45 ACP configurations.

Are all USP Compact dimensions identical?

No. The .45 ACP reference is slightly longer and uses a different barrel length and sight radius than the 9mm and .40 S&W references.

Can full-size USP parts be assumed to fit the Compact?

No. Verify the exact model, caliber, dimensions, and manufacturer part number before relying on compatibility.