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The 4.25mm cartridge and the guns that fire it (the Erika and the Menz) are significant in terms of firearms history and should not be eliminated nor consolidated. They are especially significant in that the are the smallest calibre weapons to be widely distributed and remain sought-after collector items as well as marking the lower end of semi-automatic pistol design and construction. PS, the source sites, the History book, is a prime source and very well respected. You will find mentions of this system in other books too, including Smith's classic on handguns. 173.205.214.250 ( talk) 14:04, 26 June 2024 (UTC) reply