USP

The HK USP is the full-size model in the Universal Self-loading Pistol family, with separate 9mm, .40 S&W, and .45 Auto references. Dimensions, barrel length, weight, and magazine configuration vary by caliber. This page provides neutral educational information for identifying and comparing those configurations.

HK USP specifications

• 9mm x 19: 7.68-inch length, 5.31-inch height, 1.26-inch width, 4.25-inch barrel, 6.22-inch sight radius, and 1.69-pound weight with magazine.
• .40 S&W: 7.68-inch length, 5.31-inch height, 1.26-inch width, 4.25-inch barrel, 6.22-inch sight radius, and 1.96-pound weight with magazine.
• .45 Auto: 7.91-inch length, 5.61-inch height, 1.26-inch width, 4.41-inch barrel, 6.34-inch sight radius, and 1.82-pound weight with magazine.
• Trigger-system references: SA/DA and DAO.
• Sights: Fixed.
• Magazine-capacity references: Vary by caliber and package and remain subject to applicable law.

These figures are based on the official HK USP reference. Confirm the exact caliber, trigger variant, package, and current manufacturer documentation before relying on any specification.

USP variants and identification

The standard USP is the full-size reference in this cataloged family. The USP Compact uses a smaller frame and shorter barrel, while the USP Tactical uses an extended threaded barrel and adjustable sight arrangement. Browse all related models in the USP Series or return to HK Pistols.

Compatibility considerations

Caliber, frame size, trigger variant, barrel dimensions, magazines, sights, and manufacturer part numbers can affect compatibility. Do not assume that components are interchangeable across full-size, Compact, and Tactical configurations. Confirm the complete model and caliber or consult a qualified gunsmith.

Safety and professional service

This page is for identification and educational reference and does not provide installation or 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 service and never remove, disable, or bypass a safety mechanism.

HK USP questions

Which calibers are listed for the standard USP?

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

How is the standard USP distinguished from the Compact?

The standard USP uses a larger full-size configuration. Exact dimensional differences depend on the selected caliber.

Are all USP-family parts interchangeable?

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