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Research dossier · General Reference

4.38×30mm Libra

cartridge for personal defence weapons

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General referenceInterpretive dossier study · Crown Archives visual atlas
Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionOct 28, 2025
Entity authorityQ4637252 ↗
Source-derived summary

The 4.38×30mm Libra (.17 Libra) is a centerfire cartridge designed for use in personal defense weapons.

Description

It was designed and has been manufactured by ČZW for use in their ČZW-438 PDW.

The cartridge is based on a .22 Hornet cartridge converted to a rimless design and necked down to .17 calibre.

Editorial summary

“4.38×30mm Libra” enters the record as cartridge for personal defence weapons. Crown Archives preserves that source wording while asking what 30mm, Libra and cartridge can confirm, complicate or overturn.

Editorial reviewA concise reference frame for defining the subject, testing terminology and identifying the institution closest to the evidence. The current 52-word lead offers orientation but no explicit four-digit date, so chronology should not be assumed. The selected authority fields contribute no independent date. Its strongest next move is a source search built around 30mm, Libra and cartridge.
Editorial analysis

Why this record matters

“4.38×30mm Libra” is worth following because a concise public description often conceals a longer documentary argument. Here, 30mm, Libra and cartridge provides the most credible route into that argument.

Evidence profile

The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Oct 28, 2025. The linked authority identifier is Q4637252. None of the 0 selected statements returned an explicit reference.

Critical limits

A concise general-reference account can conceal disagreements about scope, terminology or the weight assigned to individual sources. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.

How to read it

Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.

Best used for
  • Subject orientation
  • Search vocabulary
  • Locating named sources
Verify next

The closest primary source, responsible institution and strongest cited specialist reference.

Three-step research path

  1. Establish the record: confirm the title “4.38×30mm Libra”, its source revision and the description used here.
  2. Expand the search: follow 4.38×30mm Libra primary sources, 4.38×30mm Libra archive and 30mm research across catalogues and specialist indexes.
  3. Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.

Questions for further research

  1. Which source most directly establishes the central claim about “4.38×30mm Libra”?
  2. Which cited source is closest to the event, object or claim?
  3. Which institution is responsible for the underlying evidence?
Subject index

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Source & attribution

This entry incorporates text from “4.38×30mm Libra” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.