FNS Conversion Kit

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    S

    Sleepy

    Active Member
    Jan 19, 2013
    139
    I remember seeing an announcement a few years ago from FN that they were introducing conversion kits for the FNS that would let you change a 9mm to 40S&W or vice versa. I have never come across any.

    Did they ever actually sell these?
     
    1

    1time

    Ultimate Member
    Apr 26, 2009
    2,280
    Baltimore, Md
    The slides are different, presumably to be able to use the same recoil spring so I don't think would. The 9mm slides are milled about on the side in front of the ejection port.
     
    M

    Magnumite

    Ultimate Member
    Dec 17, 2007
    6,585
    Harford County, Maryland
    There is a difference of .028" in the nominal rim diameters (9mm and 40 S&W). This would place .014" difference on either side of a chambered 9mm cartidge rim using a 40 S&W breechface on the slide. Kimber, Block and a couple others use 40 breechfaces for both 40/10 and 9mm Luger chambered pistols. With aggressive extractor tension I could see this being a problem. I don't know the particulars of the FN so couldn't fathom a guess.
     
    N

    Name Taken

    Ultimate Member
    Feb 23, 2010
    11,891
    Central
    I've followed the platform and don't remember seeing anything about the kits.

    There really aren't a ton of spare parts out there and FN already brought out the 509. I'd be surprised considering the lack of support for the FNS that they would put out a caliber kit.
     
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