A number of online suppliers sell them. I have tried the Wolf and the one sold by GlockParts.com and found the GlockParts.com 6 pound trigger spring to be the better of these two. They run around $5 plus shipping. Same for connectors. I don't have any gen4 Glocks so I cannot speak to them about parts such as connectors. I am very familiar with gen3 parts.Good stuff. Where's the best place to get custom parts -- like a heavier trigger spring?
Since I made these postings in 2012, I have bought five gen4 Glocks and still own four of them (G17, G19, G22, and G23). All have received some level of modifications from me to get the trigger I want. I do my mods incrementally, taking measurements at each step and writing them down. I backout some mods and them mix them up a bit using logic and a measure of common sense in the process. The four gen4's I currently own have very good Glock triggers with three of them coming in at that desirable (for me) range of between 4 pounds 12-14 ounces to 5 pounds. My gen4 G19 is really nice.I watched at least 5 you tube videos on the $.25 Glock trigger job last night. That is not counting the three that I stopped early because they started out with a hammer on the pins.:buttkick: It looked like a pretty easy way to improve on what is less than an ideal (for me)trigger. Without going through all of the tedious details I will say that I did not harm any of the parts on my Glock. I used Wizards Metal Renew which brought the parts to a mirror finish with little effort. The results are dramatic. I know that it sounds incredible, but it feels as if the trigger pull weight has dropped by a pound or more. The trigger feel is much more predictable and crisp.Looks like warm weather today so I am headed to the range to see how it shoots.