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substitute recoil spring

  1. FNX Series Substitute/Replacement Recoil Spring Assemblies

    FN FNX
    Does anyone know of a possible substitute/replacement recoil spring assemblies (spring lb) for the FNX Series? The purpose is to customize the recoil spring for different cartridge charges (+P+, etc) or caliber changes (convert FNX-40 to 357 SIG, etc). FNX-9 FNX-40...