Marine Corps Service Questions?

I have a several questions to ask: 1. Can you get a specific mos(not field) if you join the reserves? 2. Can you you switch from reserves to active duty, if so when and how? 3. Is it hard to switch from the reserves to active duty? 4. Is it hard to get a lateral move? 5. If on active duty what is your job... show more I have a several questions to ask:
1. Can you get a specific mos(not field) if you join the reserves?
2. Can you you switch from reserves to active duty, if so when and how?
3. Is it hard to switch from the reserves to active duty?
4. Is it hard to get a lateral move?
5. If on active duty what is your job in your duty station?
6. Can you partake in MCMAP whenever you want and how?

If you answer these questions then thank you.
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