Great trigger - ZEV Technologies Fulcrum Ultimate Trigger Kit, Trigger Pad w/Safety, Gen4 Glock 17/19/26/34 w/Dragonfly, Gen4 Pistol Slide,G17 Absolute Cowitness w/RMR Cover Plate

Great replacement trigger for the stock Glock Trigger. I have Zev triggers in the G19 and G21SF. I have kept the triggers the way they came from Zev without adjusting any pre or post travel and still am very pleased with the performance. If you use the lighter springs, you may need the Zev striker as I had a few rounds that failed to fire due to the spring not providing enough resistance to impact the primer.