There are many types/design of sidelock and boxlock and most companies would have had sets of drawings for each part/component .Any diagram of the complete assembled gun would only be of help in giving an overall picture of how it was supposed to go together and work .
I have for instance a drawing of a Webley 700 action but without the rest of the 50 or so other drawings it is all but useless.
Please also bear in mind that drawings are the ideal and many components will be made with the necessary allowances for filing up and fitting .
I wish you luck in you quest .
