Dawnguard DLC The Elder Scrolls V: Skyrim is an expansion centered on the ancient conflict between an order of vampire hunters and a powerful clan of vampires. The "rus7z full" label typically refers to a complete Russian localization
Weaponry: The DLC introduced crossbows, which offer higher stagger chance and the ability to use explosive bolts, though they reload slower than traditional bows. dlc dawnguard rus7z full
If you want a legitimate review of Dawnguard itself: Dawnguard DLC The Elder Scrolls V: Skyrim is