The M89H heavy handguard incorporates our premier drive lock system for large frame SR25/DPMS high shelf pattern rifles. Featuring a robust titanium barrel nut, it boasts full-length M-LOK slots at 3, 6 and 9 o'clock positions, along with two integrated steel QD sockets offering limited rotation. Additionally, fast slots positioned below the 12 o'clock rail allow secure attachment of cables using zip ties. Crafted to meet the exacting standards of users who prioritize rigidity, our 89 series handguards are renowned for their strength and versatility. With maximum strength, extensive mounting space and lightweight material choices, the M89H stands as a pinnacle choice for discerning shooters seeking top-tier performance in their firearm accessories.