FAB Defense Front and Rear Set of Flip-Up Sights n/a Imported Designed for M16/AR15/M4 weapons with same-plane mounting location and similar sight height Rear sight finger adjustable for windage Front sight finger adjustable for elevation Low-profile, lightweight design Ambidextrous deployment and control High-grade polymer and metal construction Spring-based locking mechanism will not break or deform Mounts to MIL-STD-1913 Picatinny rails Front and rear sight set