Glock originally called the 34 and 35 “tactical/practical”. They claimed multipurpose of home defense, duty pistol and competition. Many are still deployed by tactical units.
There’s a lot of 19s used by LE and tactical units they like the lighter weight. This eventually led to the 45 (19 slide w/17 frame). The 19 is really considered the “do all” gun. The one people choose if they could “only have one”
My personal favorite though will always be the 17. And since I am not limited to just one gun I own lots of them. I like it’s balance better than the 34 (I’m sure that’s a personal preference) and the grip size better than the 19.
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