I have a G17, you're more than welcome to shoot as much as you want. If you ever make it out to Dietz or Bexar co range.Glock seems to be popular. It appears that everyone and their mother's make aftermarket threaded barrels.
I have never fired a Glock but have fired 9mm in other makers. Would probably be your best choice.
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thanks again - I'm thinking the Glocks would be the way to go - could also get a threaded barrel for her g34 (in addition to the g19s)
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I'm thinking the Glocks would be the way to go - could also get a threaded barrel for her G34