This stands for the Firearms Safety Education Service of Ontario. It is an association of instructors that have been designated by the Chief Firearms Office to teach the CFSC and CRFSC in Ontario, as we do here, in Toronto. All legitimate instructors must be certified by the FSESO.
There have been some individuals and companies that claim to provide you with the firearms safety courses, but they ARE NOT certified to teach the CFSC/CRFSC, and the RCMP will not accept other courses when applying for your firearms license.
Ask the instructor if they are certified by the Chief Firearms Office of Ontario, and if not, don’t waste your money and time with them.
Instead, book one of our courses, which you can do here:https://firearmstoronto.ca/courses/