Mrguns Posted December 11, 2018 Share Posted December 11, 2018 is there a difference between the 2? are they interchangeable? thx Link to comment Share on other sites More sharing options...
JBP55 Posted December 12, 2018 Share Posted December 12, 2018 Glock parts numbers prior to the Gen 5 models was not the same for the .40 and 9mm firing pins. 9mm was GLO49 and .40 was GLO4270. Link to comment Share on other sites More sharing options...
Braxton1 Posted December 15, 2018 Share Posted December 15, 2018 (edited) 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 December 15, 2018 by Braxton1 Link to comment Share on other sites More sharing options...
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