Geissele 10.5" HK416 M-LOK MK15 Black Super Modular Rail 05-827B is a lightweight, high-strength free-float handguard designed specifically for HK416-style AR-15/M4 platforms. With its streamlined 10.5? length, it is optimized for compact rifle builds while providing maximum modularity with both a continuous top Picatinny rail and M-LOK slot access at multiple positions. Rigorously machined and finished for durability, this rail maintains balance and rigidity in compact tactical applications. Material: 6061-T6 or 7000-series aircraft aluminum (platform-specific) Finish: Type III hardcoat anodized matte black Length: 10.5? free-float design Rail Layout: Continuous Picatinny on top; M-LOK slots at 3, 6, 9 o’clock Attachment: Geissele’s torque-free hinge-style clamp with anti-rotation tabs and set screws Weight: Approximately 12–14 oz (varies by batch) Compatibility: HK416-pattern pinned barrel configuration only Part Number: 05-827B Geissele Automatics Geissele 10.5" HK416 M-LOK MK15 Black Super Modular Rail 05-827B