I have a new mp22k build and for whatever reason I cannot get it to set off any rounds. I’ve tried multiple brands and all I get are dimpled cases and no pew sound. I’m pretty sure it’s my firing pin but it looks the same as the other two builds that do work. Should I file it down to a point or leave it like it came from scs?

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    26 days ago

    Not a point, but do file the sides, reducing the tip to about 1/2 width leaving a flat front.

    What spring are you using for fire pin?