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Directory / Compare / USP40 Compact (V1) vs USP45 (V1)
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Heckler & Koch USP40 Compact (V1) vs Heckler & Koch USP45 (V1)

Heckler & Koch publishes both as USP models. They are chambered differently — the USP40 Compact (V1) in .40 S&W, the USP45 (V1) in .45 ACP — so nothing below compares their cartridges. The USP45 (V1) is 28 mm / 1.1 in longer overall; its barrel is 21 mm / 0.83 in longer; both list 12-round standard magazines.

Computed differences06
FieldDifference
Overall length28 mm / 1.1 in (USP45 (V1) is greater)
Overall width3 mm / 0.12 in (USP40 Compact (V1) is greater)
Overall height15.5 mm / 0.61 in (USP45 (V1) is greater)
Barrel length21 mm / 0.83 in (USP45 (V1) is greater)
WeightNot published by both
Standard capacityIdentical figures
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.
Size, to scale
To-scale size envelopes: USP40 Compact (V1) vs USP45 (V1)Boxes drawn from published overall dimensions at one scale, aligned at the rear. Heckler & Koch USP40 Compact (V1): 173 mm long, 127 mm high, 35 mm wide; Heckler & Koch USP45 (V1): 201 mm long, 142.5 mm high, 32 mm wide.050 mm100 mm150 mm200 mmSide · length × heightUSP45 (V1) is 28 mm longerTop · length × width
  • Heckler & Koch USP40 Compact (V1)Length 173 mm / 6.81 inHeight 127 mm / 5 inWidth 35 mm / 1.38 in
  • Heckler & Koch USP45 (V1)Length 201 mm / 7.91 inHeight 142.5 mm / 5.61 inWidth 32 mm / 1.26 in
Boxes, not silhouettes: makers publish a pistol's overall envelope, not its shape, so that is all this draws. Every box is aligned at the rear and drawn at one fixed scale, the same on every page of this site, so drawings compare across pages. It is not life-size on your screen.
Published fields, side by side
FieldUSP40 Compact (V1)USP45 (V1)
ManufacturerHeckler & KochHeckler & Koch
Chambering.40 S&W.45 ACP
Overall dimensions173 × 35 × 127 mm / 6.81 × 1.38 × 5 in201 × 32 × 142.5 mm / 7.91 × 1.26 × 5.61 in
Barrel length91 mm / 3.58 in112 mm / 4.41 in
WeightNot published887 g / 31.29 oz (HK's own column heading)
Standard capacity12 rounds12 rounds
Trigger pull51 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)
VerificationSource verified 2026-08-13Source verified 2026-08-13
Full records, with every value beside the source it came from: Heckler & Koch USP40 Compact (V1) · Heckler & Koch USP45 (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 correction.