ok im just messing around with like a training map, and id like to make is so a bot is manning an mg at the top of a street, ive set up everthing but everytime i run the map the mg does a 180 and kills the bot, how can i fix it.

You could start with the Search function: someone made a nice tutorial in the mapping forum on this subject, for a training map. search with words like grunt, or training map.

Note: If you set the func_tank as axis friendly, it might kill your allied_grunt :D