What should I expect from AIT using the AC2RC option reclassing to 31B?

MPS go thru 19 weeks of OSUT. You will be Phase IV and V - AIT. This tells you all you need to know. SPC (Join to see). You will be what is called an insert... meaning you are being inserted into a company after they complete the BCT portion. Since you are prior service, the Drill Sergeants will look to you to be a student leader.
http://www.wood.army.mil/usamps/Training/BasicAndAIT.html

Most MUTAs (Multiple Unit Training Assemblies) formerly known as Battle Assemblies, AKA Drills are mostly admin watch power points do mandatory training, especially now with budget cuts, if your unit doesn't have a local training area field is limited to a few times a year. AT's are full blown busy times lots of training cramped into the tightest group as possible. They are usually fun and enjoyable times. If you are contemplating joining the reserves go for it. Reclass is very easy for some MOS's it's just a two week course you do for AT your first year.

Where you going for AIT? The active duty school is at Ft. Leonard Wood in MO, the reserve school was at Ft. Hunter Liggett in CA. As aninsert at rhe active school they are going to try and find you a slot exactly where you need to be, but depending on things you could find yourself bouncing between units to get to all the ranges you need to use and all the classed you need to have. The USAR school is 30 day long and you start and finish as a platoon. Same goal, different path.

I did this process coming from the Navy to the Army. You are going to get a whirlwind bunch of classes on UCMJ, then on how to correctly fill out forms. One mistake is a "No Go". You are going to get POW training on everything from setting up a detaining area to doing cell extractions. To will be doing route recon and planning, traffic control (TCPs), riot control, MOUT training.

You really need to have an understanding of what an MP is. When people think of MPs they think we are post cops and we are, but there is so much more to being an MP. We truly are the "Swiss Army Knife" of the army. Our job is to come in right behind the infantry and hold the area so that it can not be retaken, make sure supply lines are clear to the front, process and guard the POWs, provide law enforcement to both military and civilians, and most important; make sure that the infantry doesn't get attacked from the rear. That is what your training is going to be all about.

You have picked one of the best jobs in the army for sure.

As a former Instructor at the MP school (Weapons Instructor), I can tell you that you will mostly be left alone as long as you do what is expected of you as a Soldier. You will be a student leader when it is needed. The new soldiers will always ask you questions. My best advice is to tell them to ask the Drill Sergeants. Stay away from them as much as possible. They will get you in a lot of trouble if they can. While going thru training, as an insert, you will be allowed to have a cell phone, smoke, and go to the PX and on base resturant to eat for chow if not in the field. Do not let anyone use your phone or give them a smoke or get them food they should not have. We had a problem with a few inserts that did that. That is the best advice I can give. Basically just do the right thing.

MP, sounds like a good change. I know a lot of MP's but they a re all active duty. I can only assume that you will be heavily engaged in millitary and civilian law classes. Firearms and special tactics and weapons training, crowd control, search seizure training and arresting procedures. it all sounds like a lot of fun.

MP reclass is 4 weeks. Depending on budget and seat availability you can do phase 1&2 back to back or one phase each year. Roger that on drills being admin times. Record reviews. SHARP.

SPC P, Are you transferring to the RC before re-classing, or re-classing first? Makes a difference in what re-class course you'll attend.

I enjoyed being an MP on active duty but in the guard on drill week ends it was mostly class room training. School has probably changed since 1980 but is probably still a mix of law enforcement and combat.

Your gaining unit's Mission Essential Task List will determine the training they emphasize but keep in mind all the administrative tasks that are handled on active duty as they are needed have to be handled in the 2 days (4 MUTA's) during drill. I'm National Guard but anyone who's ever been in the military knows paperwork makes the world go round. As far as the way you can expect to be treated at Ft Leonard Wood; it's TRADOC so, school house etiquette. I can't tell you what AIT for 31B is like now. It's been better part of ten years now but I was just down there for AT. My unit recertified on L&O and did our OJT with the 463d. Just remember MP stands for Multipurpose. Good luck.