Side-by-side · Manufacturer-published fields only
Heckler & Koch USP45 (V1) vs Heckler & Koch USP9 Compact (V1)
Heckler & Koch publishes both as USP models. They are chambered differently — the USP45 (V1) in .45 ACP, the USP9 Compact (V1) in 9x19mm Parabellum — 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; the USP9 Compact (V1) lists 1 round more of standard capacity. One field is not comparable — overall height — because the makers publish them on different measurement bases.
Computed differences06
| Field | Difference |
|---|---|
| Overall length | 28 mm / 1.1 in (USP45 (V1) is greater) |
| Overall width | 3 mm / 0.12 in (USP9 Compact (V1) is greater) |
| Overall height | Not comparable — USP45 (V1): no basis stated; USP9 Compact (V1): HK's metric cell is blank in this caliber's row, so the millimetre figure is converted from its published 5.00 in |
| Barrel length | 21 mm / 0.83 in (USP45 (V1) is greater) |
| Weight | Not published by both |
| Standard capacity | 1 round (USP9 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.
Published fields, side by side
| Field | USP45 (V1) | USP9 Compact (V1) |
|---|---|---|
| Manufacturer | Heckler & Koch | Heckler & Koch |
| Chambering | .45 ACP | 9x19mm Parabellum |
| Overall dimensions | 201 × 32 × 142.5 mm / 7.91 × 1.26 × 5.61 in | ≈173 × 35 × 127 mm / 6.81 × 1.38 × 5 in (height: HK's metric cell is blank in this caliber's row, so the millimetre figure is converted from its published 5.00 in) |
| Barrel length | 112 mm / 4.41 in | 91 mm / 3.58 in |
| Weight | 887 g / 31.29 oz (HK's own column heading) | Not published |
| Standard capacity | 12 rounds | 13 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 USP9 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.