If you submit an ATIP (FOI is the US term), ensure you are thorough! Ask for:
"All existing records, including but not limited to transient records, e-mails, hand written notes, meeting minutes, records of decision, records of discussion, testing records, photographs, notebook pages, blackberry messages, text messages, briefing notes, communications directed at or from any Minister or Member of Parliament, and summaries of all conversations in which decisions were made that pertain to the testing, classification, consideration, handling and discussion of all firearms of the pattern commonly referred to as the RPD from all manufacturers in the world, including semi-automatic versions for the period beginning 17 September 2006 through to 17 September 2016."
You need to stay within 10 years or they will definitely come back at you and demand more money to complete the search.
Make sure you send SEPARATE ATIPs (pay the $5 each time) to The Department of Public Safety, the RCMP, The Department of Justice, the Department of Canadian Heritage (that's where Status of Women is located), the Privy Council Office and the Prime Minister's Office. You'll want to cast a broad net to get everything. If you don't send separate requests, the departments will defer to the RCMP's heavy-handed severance of the documents and the ATIP office will limit how many hours they each spend searching.
Be prepared for the RCMP to claim all their stuff is exempt (it's not, but they are lazy d!cks when it come stop taking ATIP seriously). The Departments they correspond to, however, will end up releasing it anyway as they are maniacal about compliance. I like comparing what one Department says vs what another withholds. Usually you end up with most of the whole picture.