What rank restrictions are there for a SSG looking to reclass in the USAR?

If you're looking for MOS qualifications, you can pull up the ATRRS course catalog and pull each MOS up individually. Some of the restrictions are different for RC vs AD

Good morning, SGT! If you are indeed completely finished with ALC, look into 79V Career Counselor options. You will be on a fast track to SFC and it is a very rewarding position because you impact soldiers' lives through mentorship. Moreover, you are a direct contributor to unit morale and the Army Reserve's end-strength mission. Oh and we are looking to fill AGR positions too!

From my experience, no one is going to give you a promotion. If you want it you take it. You do the things necessary to earn it on your own. Although I'm not up on the current system, in my time it was Awards and decorations (maxed), PT scores (best of your ability), Qualification (maxed), board scores (best of your abilities (190 or greater), correspondence courses (maxed), military education (maxed), civilian education (no excuse for not taking courses, as many points as you can get, every credit counts). When I got promoted to E-5 there were 40 selected in my MOS across the entire Army. When I got promoted to E-6 there were 3 that were promoted, the difference was correspondence (850 hours, maxed out) and civilian education (80 hours or 80 points). Every bit counts, don't wait for someone to promote you (it'll never happen), show them you are the rank before you earn it and the rank will come.