Bash script to remove 'x' amount of characters the end of multiple filenames in a directory?

Question

I have a list of file names in a directory (/path/to/local). I would like to remove a certain number of characters from all of those filenames.

Answer 1

 mv $filname $(echo $filename | sed -e 's/.....\.moc1$//');

or

 echo ${filename%%?????.moc1}.moc1

%% is a bash internal operator...