Geissele 15" M-LOK MK16 Black Super Modular Rail 05‑792B is a free-float handguard engineered for AR-15 platforms, offering maximum modularity and rigidity. Machined from aircraft-grade 7000-series aluminum and finished in Type III hardcoat anodized black, this 15″ rail features a full-length Picatinny top rail and M-LOK slots on all quadrants—including upper and lower 45°—permitting versatile accessory placement. Anti-rotation tabs and set screws ensure the rail remains rock-solid under recoil, while its lightweight design maintains handling balance and ergonomic control.

• Material: 7000-series aluminum
• Finish: Type III hardcoat anodized black
• Length: 15″ free-float design
• Height: 2.39″ exterior
• Inner diameter: 1.26″; outer diameter: 1.59″
• Weight: ~15.6 oz (17.1 oz with barrel nut)
• Mounting: Picatinny top rail and M-LOK slots at 3, 6, 9 o’clock and upper/lower 45°
• Features: Anti-rotation tabs, set screws for torque-free rigidity
• Part Number: 05‑792B