Fluted firing pins

[alanint]

I believe the flutes were placed there as channels for debris to accumulate as well as a gas channel. Accumulated debris can freeze the firing pin in the extended position creating a full auto Luger for the duration of cartridges in the magazine.

[alvin]

Originally Posted by alanint

Accumulated debris can freeze the firing pin in the extended position creating a full auto Luger for the duration of cartridges in the magazine.

Just thought it again..... debris definitely could prevent firing pin from moving forward freely because the firing pin string could only offer relatively weak force, but it's unlikely to block the pin from locking on the sear during the recoil cycle. Recoil force is big. So should the sympthom be mis-fire instead of slam-fire?

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Yet another advantage that I imagine on fluted firing pin .... it reduces the contact area between the pin and the round pin hole, so the pin is less likely to get stuck in winter. Many guns go even further, they use triangle pins.