The Leapers UTG PRO M-LOCK 4 Slot Picatanny Rail Section is proundly designed and made in the USA and is fully compatible with any M-LOK mounting platform. It features an optimal 0.37 inch saddle height profile for veratile attaching of accessories for a myriad of different modular applications. It is 1.57 inches in length with innovative continuous rail edges designed to provide a monolithic look and function when placing rail sections side by side. This Picatinny rail seciton is precision machined from 6061-T6 aircraft grade aluminum alloy with a matte black hard coat anodize. It includes M-LOK steel locking nut, steel Allen screw, and Allen wrench for installation.