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CFA Manufacturer & Proof Marks Flashcards

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  1. What is the primary purpose of a proof mark on a firearm?

    Answer: To certify the firearm has been tested and meets minimum safety standards

    Proof marks certify that a firearm was tested under controlled conditions and meets the safety standards of the proofing authority that applied the mark.

  2. The Birmingham Proof House and the London Proof House are both located in which country?

    Answer: United Kingdom

    Both the Birmingham Proof House (est. 1813) and the London Proof House (est. 1637) are located in England, United Kingdom, and remain active today.

  3. The 'ELG' proof mark stamped in an oval with a star is associated with which European proofing authority?

    Answer: Liège, Belgium

    The ELG (Épreuve de Liège) mark in an oval with a star is the primary proof mark of the Liège Proof House in Belgium, one of the world's oldest and most prolific proofing authorities.

  4. What does a 'nitro proof' mark on a firearm indicate?

    Answer: The firearm has been tested and approved for use with smokeless powder

    A nitro proof mark confirms the firearm was tested with smokeless (nitrocellulose-based) powder and is safe for modern ammunition, distinguishing it from earlier black-powder-only proved firearms.

  5. Under the C.I.P. (Permanent International Commission for the Proof of Small Arms) treaty, proof marks from member countries are:

    Answer: Mutually recognized by all member countries

    C.I.P. member countries mutually recognize each other's proof marks, so a firearm proofed in Belgium is accepted as safely tested in Germany, the UK, and all other C.I.P. member nations.

  6. What does a 'reproof' mark on an antique firearm that has been converted or altered indicate?

    Answer: The firearm was re-tested after modification and passed current safety standards

    A reproof mark certifies that an altered or converted firearm underwent new safety testing after modification and passed the proofing authority's current standards.