The Lantac Spada-M Free-Float M-Lok Handguard is machined from extruded 6005A-T6 aluminum and is type 3 hardcoat anodized. Durable and robust design with ultra narrow diameter. Features ambidextrous QD Sling mounting points and a zero protrusion over upper receiver which allows the handguard to be mounted to any upper designed regardless of shape or size. Patented anti slip & anti rotation system, strengthens the handguard in the receiver end area and allows strong clamping onto the barrel nut. Handguard cannot be removed from the barrel nut without removing all three fixing screws. Screws are grade 8 Steel.