Design, Feel & Performance. Zev Technologies developed the first drop-in replacement triggers for GLOCK. To this day, Zev's triggers are the first choice for shooters around the world. From its start with triggers, Zev built its business with the idea that any part it made had to be the best product of its type available on the market. Zev's customer base has expanded to elite military and law enforcement. Zev now provides leading-edge replacement parts for GLOCK, AR rifles, and components. Precision-engineered products like the Small Frame 6.5 Creedmoor 20" Rifle, AR308 Billet Receiver Set, or Adjustable Fulcrum Drop-in Trigger Kit Gen 4 will make you confident you are carrying the best firearm available.