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

Heckler & Koch publishes both as USP models. Both are chambered in .45 ACP. The USP45 (V1) is 21 mm / 0.82 in longer overall; its barrel is 16 mm / 0.63 in longer; the USP45 (V1) lists 4 rounds more of standard capacity.

Computed differences06

Field	Difference
Overall length	21 mm / 0.82 in (USP45 (V1) is greater)
Overall width	3 mm / 0.12 in (USP45 Compact (V1) is greater)
Overall height	14.5 mm / 0.57 in (USP45 (V1) is greater)
Barrel length	16 mm / 0.63 in (USP45 (V1) is greater)
Weight	Not published by both
Standard capacity	4 rounds (USP45 (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	USP45 (V1)	USP45 Compact (V1)
Manufacturer	Heckler & Koch	Heckler & Koch
Chambering	.45 ACP	.45 ACP
Overall dimensions	201 × 32 × 142.5 mm / 7.91 × 1.26 × 5.61 in	180 × 35 × 128 mm / 7.09 × 1.38 × 5.04 in
Barrel length	112 mm / 4.41 in	96 mm / 3.78 in
Weight	887 g / 31.29 oz (HK's own column heading)	Not published
Standard capacity	12 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 USP45 (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.