The Knight's Armament QD Swivel and Yaw Bipod Mount works with the Harris Engineering Swivel Bipods. The bipod mount replaces the mounting plate on the bipod, mounting to the swivel mechanism on the bipod. The mount allows for the weapon to yaw which makes multiple target acquisition much easier than a fixed mount. The yaw motion can be locked with the included thumb screw. The mount works on standard picatinny (Mil-Spec 1913) rails, the mount slides on the rail and is locked in position with the spring loaded locking bar. Construction is black anodized aluminum with steel hardware, yaw locking screw is steel with a plastic knob.