The charges were filed in D.C. Superior Court on Thursday in a legal document that generally signals a plea deal. His lawyer had no immediate comment.
Arenas has said he kept multiple guns in his locker at the Verizon Center. He claims he wanted to keep them away from his children and didn't know it was illegal.
He says he took them out of the locker on Dec. 21 in a "misguided effort to play a joke" on Crittenton.
But other accounts make the "joke" sound more serious. Crittenton allegedly told Arenas he would shoot him in his knee during an argument about a gambling debt. Days later, Arenas allegedly placed the guns near Crittenton's locker and said "pick one," according to the Washington Post.
Arenas has been suspended indefinitely by the NBA.