If a person lives in MO, must they have a MO permit, or can they legally carry on a different State permit that is otherwise recognized by MO ?

Missouri residents can carry with out of state permits. There are advantages for instate permits

In State
Reciprocity
Supports the cause and numbers if tried to be repealed
Supports the local legislator (the more we have the better chance it would be harder to mess it up in some fashion because there are X million permit holders with MO Permits) Power in numbers.
There are some states such as KS and CO that no longer recognize those UT out of state permits. Your MO permit is good in those states
where to have the endorsement placed
\Drivers Licenses
\Who see it, HR, Cash Checking, store clerks, gas station attendants
Once ID to carry
CCW permit is good for 3 years, driver's license 6 years
State ID
Decide who see’s it
Less expensive then renewing a CDL
Second for of ID
Still have CCW if DL is suspended, revoked, or confiscated

Out of State
Having to explain it’s valid on the side of the road to an ill informed officer.
Some are cheaper with longer terms
Travel, good in more states if you have more than one permit



http://www.moga.mo.gov/statutes/chapters/chap571.htm



http://ago.mo.gov/Concealed-Weapons/Concealed-Carry-Reciprocity-Missouri.htm

http://handgunlaw.us/

I don't know if you'll be crossing the border into Kansas - but they only recognize a permit if it was issued by the state in which the person is a resident of.  If you're from MN and have a FL or UT permit and carry in Kansas, you'd be breaking the law.

Thanks for the clarification.  The question came to me from a MO resident that was curious.

Im 19 years old, if MO does not lower the ccw age to 21 as it is being talked about, can I get one from FL and ccw before I turn 23?

You can get a Maine permit at age 18 and carry CCW in MO.