"The Gen 2 guns were single pin locking blocks. Some of the early Gen 3s were as well until the issues were discovered ..."
I just invested in a Timney trigger and Milt Sparks holster for a Gen 3 .40 Glock that had just been sitting in the safe for a long time. How do I tell if the one I have and finally like now has the up grade?
Gen 5 deleted the locking block pin. I have read it was to accommodate the ambi mag release.
For models that have one, the locking block pin is located directly above the trigger pin.
