Green Outline 140" Wide Front 155" Notch Green Cap Rear. Sight set with green tritium lamp square outline front and painted (non tritium) bar rear for Glocks. Designed with large highly visible front and for rapid sight acquisition. Paint bar on rear is horizontal under notch. T-CAP variants have a thinner front for increased target precision. Thin front is standard on Glock 4243 to accomodate smaller sight radius.