This page contains Fallout 3: Broken Steel Hints for Xbox 360 called "Callahan's Magnum" and has been posted or updated on May 17, 2009 by vhayste. Let us know what you think of this Hint by thumbs voting.
After choosing to destroy the Citadel using the orbital strike, you can visit the site to find a door in the lower levels leading to the armory. Note that you can't access this level by normal means. In one end of the room is a terminal beside a safe. Hack the terminal and obtain this unique magnum from the safe.
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