BAK Revolver X2 Hard Rolling Truck Bed Cover For Select 2005-2021 Nissan Frontier 6' Bed with Factory Bed Rail Caps Model 39507BAK Revolver X2 Hard Rolling Truck Bed Cover 2005 2021 Nissan Frontier 6' Bed with Factory Bed Rail Caps Model 39507 The Revolver X2 hard rolling truck bed cover features exclusive automatic rotational locking rails that secure the cover the entire length of the bed on each side. This hard aluminum roll up cover easily rolls up with one handed operation and allows use of every inch of the truck bed without blocking your rear window. This cover does it