SIONICS, in collaboration with ICON Defense, has redefined handguard attachment with the brand new RM-LOK system. This patent-pending innovation employs three independent CAMs that precisely interlock with the titanium barrel nut’s proprietary RM grooves. The result? Unparalleled rigidity and reliability. RM-LOK delivers an exceptionally strong clamping force, effectively locking the handguard to the barrel nut while simultaneously eliminating any play by driving it firmly against the upper receiver. Experience the pinnacle of handguard stability. *Cost incluedes shipping from Sionics*.