His position has “evolved.”
Romney Once Supported Assault Weapons Ban
http://blogs.wsj.com/washwire/2012/07/20/romney-once-supported-assault-weapons-ban/
Romney spokeswoman Andrea Saul said, “As he has repeatedly said, Gov. Romney believes that the best way to prevent gun violence is to vigorously enforce our laws.”
As the Journal reported last year, the change began in 2005. In May of that year, Mr. Romney declared a “Right to Bear Arms Day,” and the governor’s top aides began meeting almost monthly with the Gun Owners’ Action League. Mr. Romney also signed legislation cutting some red tape detested by gun owners in November 2005, and less than a year later he became a member of the National Rifle Association.
/johnny