Hi Dev'
Not sure which bit you mean...does moving the safety move the bit your lookin at?..If it ain't broke don't.....you know smile.....
If all the innards` are really bone dry ,they need lightly lubing, expecially where two part meet or bear against anotheror totate around a pin.
Perhaps a small fine artists brush & a light oil of your choice.
Dont flood it, of course,lol.
If you can hook up the bbls,Id do it twice..cocked & uncocked to be sure to get it in all the crooks n nannies
Don't forget to grease the hook & knuckle pin,& the ejector stems ,wipe bbs etc
What make? German?
Nice one!!!
Franc