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Thread: Usp Expert

  1. #1
    a66
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    Does anyone know what this spring is for and if it’s needed? It sits inside that hole under the rear sigh and I unfortunately deformed it when taking the rear sight out. It seems to pass all the functional checks without it
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    firing pin block spring
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    Quote Originally Posted by GuntherRommel View Post
    firing pin block spring
    Sounds important
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    You need it. Order a replacement.

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    Just shove it back in there, I did and it works fine
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    Spare parts? Lol.
    Firing pin block sounds like it is greatly needed!
    I would replace it immediately!
    M.
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    You are suppose to remove that before removing the rear sight. You do need it and I would probably replace the one that is mangled.
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    Basically the firing pin safety is typically a drop safety.
    I'm not entirely convinced a properly designed and tuned firearm requires a firing pin safety/block. IF one is in the gun then I am against disabling it or removing it since that probably means the gun can go off if you drop it and in some cases might be capable of slam firing.

    The bent spring will probably work until you can get a new one. Given how mangled it is I'd get a new one.

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