Apple TV IOS Downloads (Factory Firmware).

Apple TV

Download Apple TV 2G (AppleTV2,1) v 5.2.1 (Build 10B329a) 

Download Apple TV 3G (AppleTV3,1) v 5.2.1 (Build 10B329a) 

Download AppleTV3,2 (AppleTV3,2) v 5.2.1 (Build 10B329a)