M*CARBO Brotherhood

S&W M&P 40 Cal. Trigger Job

First time doing a trigger job on her. Watched the video multiple times before even taking down the gun.
Got into the slide and noticed that the firing pin was all black. The video showed a silver or chrome colored firing pin. The video mentions, several times, about not worrying about taking too much material off when using the 1000 grit sand paper to smooth out the burrs. Can anyone please tell me if; (1) Can I sand the pin down to it’s chrome looking finish without changing the geometry of the part. (2) if I can not go that far, do you polish a black firing pin?

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Hello @shotgun40 and welcome!
I have sanded and polished everything I could inside me MP40 shield. Works very smooth.

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