XS Tactical Sights improve your sight picture in all light conditions and increase your sight acquisition speed. The standard Dot font features a tritium insert surrounded with a thin white line to enhance daytime acquisition. The Ghost Ring Rear Sight allows the shooter to change the apertures without changing the rifle's zero. Features a large .230" tritium aperture for close range shooting and a precision .140" aperture for accuracy at long range. Sights fit A2 housing.