Yep... the moviie wasn't much like the book that I recall but....
One thing is clear, you need hi capacity magazines for robot killin!
seems most anything will work tho... ball ammo is fine and even girly man 9 mm will puncture robots but hi capacity is a must. Semi auto is helpful. Most of the so called "assault weapons" are about perfect for home defense and riot control against robots.
Get smart folks! get armed and get armed right. between the zombies and the robots you don't wanna get caught with nothing but your "kerrie in 2004" button for defense.
lazs