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g22 v g17 firing pin


Mrguns

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The firing pin nose on the 40s is slightly longer than the 9's.  Otherwise, they're structurally the same.  I wouldn't put a 40 in a 9 for anything other than the emergency "get me through the end of this match", as you may have a pierced primer or two.  

 

The way to tell on current production pins for the Gen 1/2/3/4's is counting rings on the forward portion of the firing pin:  there's one for 9, two for .40.  Older pins were unmarked on the 9's and had ".40" stamped on the firing pin lug.  Like JBP55 said, 5's are a completely different animal.

 

As a side note, just about everybody who builds aftermarket firing pins uses the 9mm dimensions and folks put those dimensioned Lightning Strikes, Jagers, Zevs, et. al. in a ton of 40's.

Edited by Braxton1
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