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

Heckler & Koch publishes both as USP models. They are chambered differently — the USP40 Compact (V1) in .40 S&W, the USP45 Compact (V1) in .45 ACP — so nothing below compares their cartridges. The USP45 Compact (V1) is 7 mm / 0.28 in longer overall; its barrel is 5 mm / 0.2 in longer; the USP40 Compact (V1) lists 4 rounds more of standard capacity.

Computed differences06
FieldDifference
Overall length7 mm / 0.28 in (USP45 Compact (V1) is greater)
Overall widthIdentical figures
Overall height1 mm / 0.04 in (USP45 Compact (V1) is greater)
Barrel length5 mm / 0.2 in (USP45 Compact (V1) is greater)
WeightNot published by both
Standard capacity4 rounds (USP40 Compact (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.
Size, to scale
To-scale size envelopes: USP40 Compact (V1) vs USP45 Compact (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 Compact (V1): 180 mm long, 128 mm high, 35 mm wide.050 mm100 mm150 mmSide · length × heightUSP45 Compact (V1) is 7 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 Compact (V1)Length 180 mm / 7.09 inHeight 128 mm / 5.04 inWidth 35 mm / 1.38 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 Compact (V1)
ManufacturerHeckler & KochHeckler & Koch
Chambering.40 S&W.45 ACP
Overall dimensions173 × 35 × 127 mm / 6.81 × 1.38 × 5 in180 × 35 × 128 mm / 7.09 × 1.38 × 5.04 in
Barrel length91 mm / 3.58 in96 mm / 3.78 in
Standard capacity12 rounds8 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 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 correction.