I'm going to be there on the 17th of October on a little less than a 4 hour layover is there anything close by to go hang out and sight see or should I stay inside the airport?

I agree with Kevin. CLT has a lot of restaurants, bars, shops. More than average airport

I would stay in the airport, that layover time is not enough time to enjoy anything outside of the airport and have to go through security again. There is plenty of places to eat and relax in that airport facility..

Yes 100% correct, during your layover its best advised you stay in the BOA, (base of operation) your already considered cleared personnel. Also prevents you from having to go through security again. @alberto salcedo.

You will need that extra time due to long lines at the restaurants

You need to check with your airline if it is okay for you to leave the area while you have a layover. If you can then check out Billy Graham library or head downtown to check out the restaurants