Hands down my favorite for the glock - Killer Innovations Velocity Glock 5.5 lb Trigger, Gen 1-4

While the price tag is high, catching it with a discount code here is makes it more reasonable. This is my 2nd one, first one I switched in and out of a 17, 22, 23 and finally made its home in a 34. Once the safety lever is depressed, you are at the wall, and it is clean break afterwards and it didn't matter which pistol it was in, it was the same. The flat face with serrations is a nice feel. While I like the Apex triggers, especially their price tag with discount codes, the Killer Innovations is noticeably smoother, less take up and shorter reset. Wouldn't hesitate to buy another.