The Warren County (Illinois) Housing Authority had banned gun possession by tenants, even in their own apartments. The Second Amendment Foundation sued on Second Amendment grounds, and the Authority agreed to repeal the ban; the repeal apparently took effect December 1, but I just learned about this today, when the District Court released its opinion largely approving the settlement.
For much more on the Second Amendment and public housing, see this earlier post (and, for still more, this one).