The UTG Super Slim Fixed Rear Sight is precision machined from aircraft aluminum with a matte black finish and features a standard A2 front sight assembly. The Super Slim Fixed Rear is slim and features a lightweight profile with a durable wear resistant finish. Tool-free windage and elevation adjustment with dual apertures ideal for a variety of different scenarios. It utilizes a single locking torx screw and square-shaped integral recoil stop for a secure zero hold and return to zero on MIL-STD-1913 picatinny rails. NoteUTG recommends to tighten the side place screw with a torque value of about 35 inch-lbs. FeaturesVertical and horizontal adjustments of canting angles Torx Screw Locking Side Plate Ensures Secure/Repeatable Zero HoldSquare-shaped integral recoil stop eliminates forward and rear-ward movement Adjustable A2 Front Sight PostDual aiming Apertures