The laws, currently in place in nearly half of the nation's states, allow for the use of deadly force without requiring an individual to attempt to retreat. Bloomberg has criticized the laws in the past, arguing they make it more difficult to prosecute shooters and endanger public safety.

"I go to states with Stand Your Ground laws. My daughters go to states with Stand Your Ground laws," he said at the National Press Club in 2012. "This is a part of America, and I think these kinds of laws that lead to vigilantism are just not appropriate."

Bloomberg has been a vocal anti-gun advocate in recent years, co-founding the coalition group Mayors Against Illegal Guns and contributing some $3 million to its efforts. 

Thousands of New Yorkers participated in a protest of the Zimmerman verdict on Sunday, culminating in a large rally in Times Square.