Ultra-slim free-float keymod handguard for AR-15 rifles and pistols. Drops the outer diameter down to a natural grip while giving you full-length 20mm Picatinny on top for optics, iron sights, and back-up rail-mount accessories. CNC-cut keymod openings on the 3, 6, and 9 o'clock positions accept keymod rail sections, hand stops, and QD sling swivels. Features: Ultra-slim free-float profile - no barrel contact Full-length top 20mm Picatinny for optics and iron sights CNC-cut keymod openings at 3, 6, and 9 o'clock Rigid one-piece build - no twist or flex under sling tension Black anodized 6061 aluminum - bare finish for cerakote or rattle-can builds Includes aluminum barrel nut, mounting screws, spacers, and Allen key Fitment: mil-spec AR-15 / M4 upper receiver, standard barrel-nut thread. Free-float install requires a barrel-nut wrench and torque spec of 30-80 ft-lbs (repeat 3x per mil-spec). Fits standard-diameter .750 or .625 gas blocks under the handguard tube - verify your gas-block profile clears the inner diameter before install.