The Arisaka Low Profile Picatinny Rail for KeyMod handguard systems features reduced height to pull any picatinny accessories closer to the handguard. The 5 slot model connects with three of BCM's patented reverse threaded KeyMod screws which will spread the increased stress of large Picatinny accessories like bipods or vertical grips over more KeyMod slots. The 3 slot version is useful when less rail space is required.NoteRequires a T15 Torx wrench for installation (not included).