Daniel Defense's Fixed Front/Rear Iron Sights are perfect as a backup option for reflex/red-dot sights, or as a stand alone aiming solution. The quickly and easily attach via Daniel Defense's patented "Rock & Lock" technology, and are made from durable yet lightweight 6061-T6 Aircraft Grade Aluminum. Aircraft Grade 6061-T6 Aircraft Grade AluminumMilitary Specification Type III Hard Coat AnodizedPatented Rock & Lock Attachment Technology Daniel Defense Fixed Front/Rear Combo DD Tornado Grey Iron Sights 19-088-09116-012