Does it really matter where they are made? For the gen 5, they were equally crappily made in both location.
My austria made had no front sight when it arrived, my usa made one had the rear sight half way out on the right. Barrel on my US made one looks like it was used, bottom half of the barrel was showing silver right where it touches the slide. My austria one had some really sticky crap on the firing pin that it went double on me (ya i should've clean the gun first) , but i never had to on my gen 3 and 4.
I gladly sold both gen 5 and never look back still own a gen3 and 4. i am not bashing glock but they really suck shxt this time around.