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Firing pin?


Dump1567

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My friend stated that the .40 and .357 sig. firing pins are longer.  Supposedly for a harder primer hit? (He just took the Armorer class.)  I notice aftermarket firing pins come in either large frame or small frame and there's no size difference between calibers.

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Dump - your friend is correct. As Matt pointed out, the nose of the firing pin is ever so slightly longer on the 40/357 firing pins.

I also have never tried to mic them, but during armorers training at Smyrna, Glock gave us these dimensions for the firing pin nose lengths: .065 for the 9mm and .080 for the 40/357.

It doesn't seem like much difference (.015) but they also cautioned us to NEVER interchange them. Thats why Glock uses two different part numbers for the 9mm and the 40/357 firing pins.

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