Took my 2nd gen G23 to Glock to day and man what an experience. The armorer changed everything in the slide and most of the parts in the frame except the trigger. They also swapped out my 3 mags for the correct 13 round mags. I also noticed that they put a bit more oil on the gun than I usually do and from what I hear on the forum. I liked the way it felt before but now it is a bit more peppy (if that is a word).