I'm not a miliary expert, so I can't comment on the impact. I would just say that exports themselves are not problematic necessarily. The control measures that are put in place on those exports are what is important.
Canada is generally very good about this. It's proper licensing, it's no re-transfers without express permission from the Canadian government, and then it's also post-shipment end use monitoring, which is something that fewer governments have embraced, but it is the most effective way to ensure that weapons are not being diverted.