Knights Armament's RAS (Rail Adapter System) Handguard for the H&K MP5 features mil-spec M1913 Picatinny rails at the 3-, 6-, and 9 o'clock positions, making it compatible with any number of rail-mounted tactical accessories. It is a drop in replacement for 8" barrel MP5 platforms. Comes with 3 KAC 11-Rib Rail Panels.