From Movie Masterpiece, the 1/6 Scale 'Bat-Pod' Collectible, available summer 2012, weighs in at approximately 8.4 pounds :

"...the authentic 1/6th scale, battery-operated 'Bat-pod' Collectible from "The Dark Knight Rises" has a headlights, light-up function. The right weapon also features a 'Machine Gun', 'Grappling Hook' and Wheel with Hub-Mounted Engines..."

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