Meprolight Front & Rear Flip-up Sights with Tritium-2 Rear Dots Designed for M4, M16 and AR-15 rifles, the KPOS system, and other weapons with same-plane mounting locations 2-dot tritium night sight on rear sight, single dot night sight tritium on front sight post Rear sight is finger-adjustable for windage, front sight is finger-adjustable for elevation Low-profile, lightweight design High-grade polymer and metal construction