Not all guns are more accurate than the shooters. I've owned two dogs that I could out shoot at 25 yards. A 2nd gen G-24 with mis-matched barrel, slide, frame and an early 3rd gen G-35. Neither would group well at 25 yards from my hands, our club's IDPA champ (a dedicated Glock guy) or from a rest. 5" was the best either one would do.
But in general it's true that it's the archer, not the bow.
As far as Glock VS CZ, once I did a trigger job on the CZ, it was very easy to shoot 2" groups at 25 yards when I was having a good day.
Glock triggers were much harder for me to master, but again, when I was dialed in I could do amazing things with my 17L. Even my G-19 shot very well at 25 yards once I installed Heinie sights.
But in general it's true that it's the archer, not the bow.
As far as Glock VS CZ, once I did a trigger job on the CZ, it was very easy to shoot 2" groups at 25 yards when I was having a good day.
Glock triggers were much harder for me to master, but again, when I was dialed in I could do amazing things with my 17L. Even my G-19 shot very well at 25 yards once I installed Heinie sights.