UTG PRO 4-Slot Keymod Picatinny Rail Section-OD Green Proudly Designed and Made in USA; Mil-spec 1.57" (4 Slots) Picatinny Rail Section Fully Compatible with Any Keymod Mounting Platform Features Optimal Profile (0.375" Saddle Height) for Versatile Accessory Attachments and Modular Applications Innovative Rail Edge Design Providing True Continuous Rail Slots When Connecting Multiple Rail Sections Precision Machined from 6061-T6 Aircraft Grade Aluminum Alloy; Combat Quality Mil-spec OD Green Cerakote Finish for Best Corrosion and Wear Resistance Includes Required Keymod Compatible Steel Locking Nuts, Steel Allen Screws and Allen Wrench for Installation