The AR-STONER V3 Free Float M-Lok Handguard features multiple positions for securely mounting popular M-Lok accessories. Extruded from the highest grade of 6061-T6 aluminum reinforced with an impervious Class 2 Type III Black Hard Anodize per MIL-A-8625 Standards and specifications, these M-Lok handguards are leading the firearms industry with cutting edge precision, along with new era innovative designs. FeaturesMachined from solid 6061-T6 AluminumType III AnodizedPrecise Drop-In FitModern Sleek DesignBarrel Nut Included