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usp9f

  1. Routine maintenance schedule?

    HK HANDGUN TALK
    How many rounds should I go between spring changes, for both mags and mainspring/recoil spring, on a USP9f LEM? Does the little captured recoil spring ever need to be changed? Do you generally change the main and recoil springs at the same time? What about the other/smaller springs? In my...
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