The Alpha Competition Series trigger is a replacement trigger for the Glock Gen3 and 4 pistols. Featuring a factory pull weight of 3 pounds; trigger can be installed easily without gunsmith; crisp trigger break; Teflon nickel (NP3) trigger bar and sear (this process virtually eliminates friction, allowing for an extremely smooth feel) and a straight aluminum trigger with safety blade. Uses all stock Glock parts and springs. Fits Glock Gen3 17, 17L, 19, 22, 23, 24, 34, 35 and Gen4 17, 19, 22, 23, 34 and 35.