UTG PRO 4-Slot M-LOK(R) Picatinny Rail Section, FDE Cerakote Proudly designed and made in USA, precision Machined from aircraft grade aluminum alloy with a flat dark earth Cerakote finish 4-Slot m-lok Picatinny rail Section fully compatible with any m-lok mounting platform Features optimal 0.37 inch saddle height profile for versatile attaching of accessories for a myriad of different modular applications 1.57 inch in length and featuring a continuous rail edge designed to provide a monolithic look and function when placing rail sections side by side Includes m-lok steel locking nuts, steel Allen screws, and Allen wrench for installation