The Revolver X4s has new features, including matte black aluminum underbody, integrated safety slat caps, rear corner caps, and more. Other Revolver X4s features include industrial-grade vinyl and matte finished seals and side rail extrusions., NEW Matte black aluminum under body and clamps for a sleek, stylish appearance . NEW Side rail seals with smooth flat design . NEW Durable strap and buckles to secure the open cover while driving . NEW Rear corner caps for a more modern appearance . NEW Integrated bulkhead seal for superior sealing . NEW Integrated safety slat caps for protection when rolling . Matte finished, industrial-grade vinyl that keeps water out . Full access to stake pocket holes for additional accessories . Patented rotational locking rails that secure the full length of the bed . Automatic latch secures easily and releases from either side of the bed . 5-year warranty.