Vũ Khí Hiện Đại, Huyết Tẩy Kinh Thành

Transmigrated into a doomed noble about to be executed, the system gives him one mission: win back his ex-fiancée. Problem is, she already loves him to death. So instead of begging for scraps, he raids the system's modern weapons shop, arms his family, and storms the capital. They wanted a simp? They got a warlord with an AK and a throne to claim.