UTG Low Profile Flip-up front sight with A2 square post assembly. Quick Detachable Front Sight with adjustable A2 square post assembly to fit all picatinny/weaver style rails. Equipped with a locking retention thumb nut and flip-up posi-lock design to guarantee zero in the most extreme combat condition. Precision elevation adjustments to enhance shooting accuracy. Tactical Low Profile with Precise Height to Work with Handguard Rail or High Profile Gas Block.