The Aleppo Codex is not the "most complete extant version of the Hebrew Bible." It is considered one of the most authoritative extant versions of the Hebrew Bible because it was the oldest known complete manuscript and was widely accepted as authoritative at least since the time of Maimonides. Now that parts of the Aleppo Codex are missing, the Leningrad Codex, written about a century later, is the earliest complete Masoretic manuscript in existence.
Israeli soldier lightly wounded after being hit by car south of Hebron (Haaretz)
from the article: Fragment of ancient parchment from Bible given to Jerusalem scholars