Apex trigger w/g3 trigger bar aluminum for most glock blue FEATURES-Reduces pre-travel-Reduces over-travel-Reduces reset-Reduces trigger pull-Delivers crisp trigger break-Maintains factory safety values-Fits Gen 3 & 4 Glock 17, 17L, 19, 22, 23, 24, 26, 27, 31, 32, 33, 34, 35, 37, 38, 39 Other Features: Drop-in replacement, reduces over-travel and reset distance, smooth uptake and reset, crisp trigger break fits g17,g17l, g19, g22, g23, g24, g26, g27, g31, g32, g33, g34, g35, g37, g38, g39 including gen4