Directory / Heckler & Koch / .45 ACP / USP / USP45 Compact (V1)
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Heckler & Koch USP45 Compact (V1)

Heckler & Koch lists the USP45 Compact in its V1 double-action/single-action configuration as a short-recoil-operated .45 ACP pistol with a 96 mm polygonal barrel, a fibre-reinforced polymer frame, a safety and decocking lever on the left, fixed sights, and two 8-round magazines.

Scope note: ID number 81000343, "USP45 Compact, .45 ACP, (V1) DA/SA, safety/decocking lever on left, two 8rd magazines", UPC 642230260955.
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SEE THE hk-usp9 RECORD for the sourcing and the manual-versus-page reasoning, and hk-usp9-compact and hk-usp40-compact for the weight problem all three share. NO WEIGHT IS RECORDED, AND THIS IS THE ROW THAT PROVES THE TABLE RATHER THAN ONE CELL IS AT FAULT. Subtracting HK's "Without magazine" column from its "With empty magazine" column gives the magazine's weight: −43 g for the 9 mm Compact, −3 g for the .40, and +2 g here. Only this row avoids a negative magazine, and 2 g is refuted by HK's own full-size USP page, which states that a .45 USP magazine weighs 98.9 g. So all three rows are internally contradictory and no reading of the table survives. The archived manual has no weight column to arbitrate with. Both weight fields stay empty here as on the other two Compacts; see hk-usp40-compact for why the apparently salvageable "Without magazine" column was deliberately not rescued. THE SMALLEST STANDARD CAPACITY IN THE DIRECTORY, AND HK'S SOURCES AGREE ON IT. The specification row reads "8/10 Rounds", the manual's table gives this model a flat capacity of 8, and every catalogue number HK lists — 81000343, 81000344 and the two V7 LEM configurations — ships 8-round magazines, with no 10-round SKU among them. So 8 is recorded as standard and 10 as the optional figure the spec row publishes. Worth noting the manual and the page disagree in shape rather than in substance here: the manual states only the 8, the page offers 8 or 10, and recording both loses nothing. DIMENSIONS DIFFER FROM THE OTHER TWO COMPACTS ON EVERY AXIS BUT WIDTH, exactly as the full-size .45 does from its siblings: 180 mm long against their 173 mm, 128 mm tall against 127 mm, a 96 mm barrel against 91 mm and a 143 mm sight radius against 135 mm, with the 35 mm width shared. Every pair reconciles exactly — 180 mm/7.09 in, 128 mm/5.04 in, 35 mm/1.38 in, 96 mm/3.78 in, 143 mm/5.63 in — so the defect on this page really is confined to the weight columns. Trigger action follows the SKU: the spec row reads "SA/DA, DAO" without designating either, and 81000343 is the V1 double-action/single-action configuration. The V7 LEM and night-sight configurations are separate listings. Trigger pull is HK's 20 N (SA) and 51 N (DA), newtons published and pounds converted. Frame class is unset: "Compact" is part of the model name rather than a published size class. Year introduced is unrecorded, as on every USP record. Also published and unrecorded for want of a schema field: a 143 mm / 5.63 in sight radius, a polygonal bore profile, a fibre-reinforced polymer frame, a patented recoil reduction system, and the $1,209 MSRP.

Reference fields

ManufacturerHeckler & Koch[1]
Manufacturer seriesUSP
Firearm categoryHandgun[1]
Manufacturer chambering.45 AUTO[1]
GenerationNot yet verified
Manufacturer listingListed by HK as ID number 81000343, "USP45 Compact, .45 ACP, (V1) DA/SA, safety/decocking lever on left, two 8rd magazines", UPC 642230260955[1]
IgnitionHammer-fired[2]
Trigger actionDouble-action / single-action[1]
Operating systemRecoil-operated[2]
Slide finishNot yet verified
ControlsSafety and decocking lever on the left; fixed sights; patented Lock-Out safety device on a corrosion-proof fibre-reinforced polymer frame[1]
WarrantyLifetime Limited Warranty on all new Heckler & Koch Inc. firearms purchased after January 1, 1998, to the original retail purchaser only and for that purchaser's lifetime — extendable to a donee named at the time of the original purchase, valid only on firearms imported into the United States and distributed by HK Inc., and applying only to retail purchases by individuals through an authorized HK dealer. Two exclusions are stated: firearms bought by United States military, government, law-enforcement or security organizations for duty issue instead carry a one-year limited warranty, or whatever a valid contract specifies; and rimfire .22LR rifles and pistols carry a one-year warranty[3]
MSRPNot recorded
Verification boundary: Published technical data are rounded, may not reflect manufacturing tolerances, and may change without notice. MSRP is not recorded: most cited product pages do publish a price, but it changes without notice and independently of the specification, so this directory has no field for it and the row stays blank rather than carrying a figure that would silently go stale. Values marked ≈ were converted by this directory from the unit system the source published; the unmarked figure in the same row is the published one.
Evidence tiers backing this record: Manufacturer. Unmarked values come from manufacturer documentation; any value drawn from a lower tier is labeled inline with that tier. Where two sources disagreed, the higher tier was recorded and the disagreement noted.

Sources

  1. [1]Accessed 2026-08-13 · Captured 2025-02-16 from https://hk-usa.com/hk-models/usp-compact/
  2. [2]Accessed 2026-08-13 · Captured 2024-06-11 from https://hk-usa.com/wp-content/uploads/USP-Operators-Manual-1.pdf
  3. [3]Accessed 2026-08-13 · Captured 2026-02-06 from https://hk-usa.com/warranty/

Common questions

Answered from this record's cited fields only. Where a manufacturer publishes nothing on a subject, the question is not asked rather than answered with a blank.

01What caliber is the Heckler & Koch USP45 Compact (V1)?

The Heckler & Koch USP45 Compact (V1) is chambered in .45 ACP. Heckler & Koch writes it as .45 AUTO. Ammunition should match the exact chambering marked on the firearm.

02How many rounds does the Heckler & Koch USP45 Compact (V1) hold?

Heckler & Koch lists an 8-round standard magazine for the USP45 Compact (V1). Heckler & Koch also lists 10-round capacity as optional. These are magazine capacities; a round carried in the chamber is not counted here.

03What is the barrel length of the Heckler & Koch USP45 Compact (V1)?

Heckler & Koch lists a barrel length of 96 mm / 3.78 in.

04What are the dimensions of the Heckler & Koch USP45 Compact (V1)?

Heckler & Koch publishes 180 × 35 × 128 mm / 7.09 × 1.38 × 5.04 in. Any measurement basis shown is the manufacturer's own qualifier; where none is shown, the manufacturer states none.

05Is the Heckler & Koch USP45 Compact (V1) striker-fired?

Hammer-fired. Heckler & Koch publishes this as "SA/DA". This is recorded from the manufacturer's own classification rather than inferred from the mechanism.

06What is the trigger pull on the Heckler & Koch USP45 Compact (V1)?

Heckler & Koch lists 51 N / ≈11.47 lb (double-action); 20 N / ≈4.5 lb (single-action). A published figure is a specification rather than a measurement of any individual firearm.

07Does the Heckler & Koch USP45 Compact (V1) have a warranty?

Heckler & Koch states: Lifetime Limited Warranty on all new Heckler & Koch Inc. firearms purchased after January 1, 1998, to the original retail purchaser only and for that purchaser's lifetime — extendable to a donee named at the time of the original purchase, valid only on firearms imported into the United States and distributed by HK Inc., and applying only to retail purchases by individuals through an authorized HK dealer. Two exclusions are stated: firearms bought by United States military, government, law-enforcement or security organizations for duty issue instead carry a one-year limited warranty, or whatever a valid contract specifies; and rimfire .22LR rifles and pistols carry a one-year warranty. Terms are as published at the date this record was checked and may vary by region.

Source conflictThis record’s sources disagree, and it is on the register: A pistol that weighs less with a magazine in it. Nothing was repaired to resolve it — see the entry for what the sources publish and what this record does with it.