Knight's Armament Picatinny Rail Rib Panels

Knight's Armament Picatinny Rail Rib Panels are lightweight polymer panels ribbed for grip and to insulate the support hand from barrel heat. Originally designed for use on the KAC M4 RIS and M4 RAS rails, these panels are compatible with many other railed handguards. Specs include rib counts and lengths: 2-Rib (1.65 in), 4-Rib (2.65 in), 5-Rib (3.47 in), 6-Rib (3.90 in), 9-Rib (5.48 in), 11-Rib (6.15 in).