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

i have list of file names in directory (/path/to/local). remove number of characters of filenames.

example filenames:

iso1111_plane001_00321.moc1 iso1111_plane002_00321.moc1 iso2222_plane001_00123.moc1 

in every filename wish remove last 5 characters before file extension.

for example:

iso1111_plane001_.moc1 iso1111_plane002_.moc1 iso2222_plane001_.moc1 

i believe can done using sed, cannot determine exact coding. like...

for filename in /path/to/local/*.moc1;     mv $filname $(echo $filename | sed -e 's/.....^//'); done 

...but not work. sorry if butchered sed options, not have experience it.

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

or

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

%% bash internal operator...