Brigand Arms ATLAS Handguard - 15 in AR10. This allows fine adjustment in alignment and secure mounting. Tube: Patented carbon fiber braid Caps: Aluminum Barrel nut included. Specifications for Brigand Arms ATLAS M-Lock Handguard: Manufacturer: Brigand Arms Color: Black Gun Make: AR Platform Gun Type: Rifle Gun Rail: Picatinny Included Accessories: Standard Quantity: 1 Package Contents: Brigand Arms Atlas Handguard for AR 15 Brigand Arms 15A-308: ATLAS Handguard - 15 in AR10