Heckler & Koch USP40 (V1) vs Heckler & Koch USP45 Compact (V1)

Heckler & Koch publishes both as USP models. They are chambered differently — the USP40 (V1) in .40 S&W, the USP45 Compact (V1) in .45 ACP — so nothing below compares their cartridges. The USP40 (V1) is 15 mm / 0.59 in longer overall; its barrel is 12 mm / 0.47 in longer; the USP40 (V1) lists 5 rounds more of standard capacity.

Computed differences06

Field	Difference
Overall length	15 mm / 0.59 in (USP40 (V1) is greater)
Overall width	3 mm / 0.12 in (USP45 Compact (V1) is greater)
Overall height	7 mm / 0.27 in (USP40 (V1) is greater)
Barrel length	12 mm / 0.47 in (USP40 (V1) is greater)
Weight	Not published by both
Standard capacity	5 rounds (USP40 (V1) is greater)

How these differences are computed: each is the arithmetic difference between the two published figures, and it is only shown where both sources measured the field the same way. Where a source states a measurement basis the other does not match, the row says so instead of subtracting — figures on different bases are not comparable even when the numbers sit side by side. Differences marked ≈ involve at least one figure this directory converted between unit systems, so the difference is no more precise than that conversion.

Published fields, side by side

Field	USP40 (V1)	USP45 Compact (V1)
Manufacturer	Heckler & Koch	Heckler & Koch
Chambering	.40 S&W	.45 ACP
Overall dimensions	195 × 32 × 135 mm / 7.68 × 1.26 × 5.31 in	180 × 35 × 128 mm / 7.09 × 1.38 × 5.04 in
Barrel length	108 mm / 4.25 in	96 mm / 3.78 in
Weight	820 g / 28.96 oz (HK's own column heading)	Not published
Standard capacity	13 rounds	8 rounds
Trigger pull	51 N / ≈11.47 lb (double-action); 20 N / ≈4.5 lb (single-action)	51 N / ≈11.47 lb (double-action); 20 N / ≈4.5 lb (single-action)
Verification	Source verified 2026-08-13	Source verified 2026-08-13

Full records, with every value beside the source it came from: Heckler & Koch USP40 (V1) · Heckler & Koch USP45 Compact (V1). More from these makers: Heckler & Koch.

Reference information only. Not legal, purchasing, training, carry, storage, or assembly advice. Manufacturer technical data are rounded and may change without notice. Spotted an error? Submit a source-backed correction.