To be pedantic, "active component" is specifically not "active duty"; it is the term used by Congressional committees & others to refer to 'regular' branches (and the term 'regular' is *not* used, as I understand it to avoid the implication that the Reserve / NG is "not regular").
"Active duty" is definitely frequently confused with active/regular but it's not the same as "active component". It's actually funny because I feel like Navy has mostly squashed "Regular Navy" from the vocab in favor of active component, so that Navy RC aren't labeled as being 'not regular'.