BTF from FNS 9 & 9C - Page 2

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Thread: BTF from FNS 9 & 9C

  1. #11
    Member OG17's Avatar
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    Quote Originally Posted by street doctor View Post
    this is most likely your issue. in my experience this ammo is under powered.
    Quote Originally Posted by Tim C View Post
    Thanks that has been my thoughts too

    But we can't fully discount that it may be a mechanical issue until I shoot different ammo through them and observe the results.
    FNS 9, FNS 9c, FNX 45


  2. #12
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    Quote Originally Posted by OG17
    Walt - why would the Magtech cause BTF with the FNS and not the Glocks. Is the slide cycling speed that much different?
    How about your CZ PCR? While form generally follows function, there are different ways to get there.

    Recoil springs (which aren't as easily tweaked in a Glock or FNS as other guns) can affect slide velocity. With the CZ, you can get a slightly lighter recoil spring from Wolff Springs, or a lighter hammer spring (which also affects slide velocity, as the slide pushes it back after each shot.)

    Glock uses the same recoil spring assembly for many of their guns across calibers when they have the same frame -- and change slide weight to control velocity. I'd be willing to bet that the springs are similar between your Glock 17 and FNS 9 (and might even be interchangeable, as they are quire similar), but the slides themselves might have different weights.

    I don't think you can compare things on such a high level and expect to make sense of it without really getting into details (and, sadly, having a better understanding of the design characteristics of the guns in question.)
    Last edited by WaltSherrill; 03-21-2017 at 06:38 PM.
    HK SD9 Tactical and OG17 thanked this.

  3. #13
    Member OG17's Avatar
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    Thanks Walt.
    FNS 9, FNS 9c, FNX 45

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