The Leapers UTG PRO M-LOK Handguard is a lightweight 15 modular rail system designed for the AR-15 platform. Precision-machined from 6061-T6 aluminum with a Matte Black Type III Hardcoat Anodized finish, this 13.10 oz unit features a slim 1.33 internal diameter and a 1.53 width. It boasts a continuous 38-slot Picatinny top rail and 28 M-LOK slots across multiple tracks, including 45-degree offset positions. The system utilizes a patented steel barrel nut that requires no timing, along with integral anti-rotation tabs to ensure a rigid, flex-free interface with the receiver. Note: The patented no-timing barrel nut significantly simplifies the installation process by allowing the gas tube to pass through without needing to align the nut to a specific torque-heavy position.