The shot traveled an astonishing 3,540 meters, or about 2.2 miles, before reaching its target - killing an ISIS insurgent in Iraq sometime in the past month, according to a report by The Globe and Mail.
Opposition parties have repeatedly accused the Liberals of misleading the public about the nature of Canada's mission in Iraq by claiming that Canadian troops are not in combat.
"The shot in question actually disrupted a Daesh [Islamic State] attack on Iraqi security forces", said a military source, who stressed the operation fell within the strictures of the government's advise and assist mission.
National Defence says the sniper is part of the Joint Task Force 2 special forces unit and was supporting Iraqi forces in their fight against the Islamic State of Iraq and the Levant when he shot an enemy fighter from 3,540 metres away.
Such long flying time would require the sniper to take into account not only distance, but also wind speed, temperature, and the rotation of the Earth.
The Globe and Mail said the shooter used a McMillan Tac-50 rifle, which is made in the US.
A Canadian Special Forces sniper trained the sites of his rifle on a man almost three and a half kilometres away in Iraq.
To put that into perspective, that distance is like setting up your rifle at the end zone of a football field, looking through your scope, firing off a shot and hitting a target from 38 football fields away.