maybe i'm in the minority, but i would not recommend wearing a JROTC uniform, this is not a JROTC function. likewise, i would not recommend wearing it to a MOC interview. your JROTC experiences and attributes gained will come across loud and clear in the interview.
what i do recommend is dressing as if this is something very important to you. that may be a jacket and tie, or might be khakis and a crisp polo shirt. shined shoes and dirty shoes both get noticed.
what makes a much bigger impression on me is how you handle yourself during the interview, and whether or not you give the impression that this is YOUR time, YOU are in control, and YOU are prepared.
just a few weeks ago, i interviewed what i expected to be a superstar candidate. i arrived at the front door exactly on time and knocked, and had to wait several minutes for someone to make it to the door. i was eventually greeted at the door by the PARENT, who led me inside, did intros and made some small talk. we were eventually joined by the candidate, who was dressed in what i would describe as leisure wear.
needless to say, this candidate did not start out on the right foot. all indications were that this was more important to the parents than it was to the candidate.
the candidates who make the best impression from the beginning meet me at the door before I knock, make good eye contact, give a firm handshake, and speak confidently and comfortably, and are clearly in control of the moment. when the parents eventually get involved, it's because the candidate is directing them when to join us and also when it's time for them to leave. (when we setup the interview, i let them know that that parents are invited to participate during the first part, then it's 1:1 after that) if the candidate seems to defer to me to direct the parents involvement, i certainly don't hold it against them, but i'm always impressed by the candidates who 'take charge'.
these are just my thoughts, others may view things differently
best of luck