Went shooting yesterday with a friend. He has a Glock 23 Gen 3. I have a Glock 19 Gen 4, 17 Gen 4 and a 27 Gen 4. I noticed that both my 27 and his 23 had much better triggers than my 17 and 19. The triggers on the 40's feel like a heavy single action trigger. While in the 9's the break is just not as crisp. My 17 has over 500 rounds through it. The 19 only has just over 100. The 27 has well over 500. His 23 is close to, if not over, 500. I'd like to know if anyone else notices this and if there is an explanation.