The quick clot and C-A-T tourniquet I use because I have training to use them and I can get them, along with the shell dressings and triangular bandages for free. I hope to never have to use quick lot on a stranger though, especially if it was a child. I have seen a hard core soldier bust into tears and scream at the top of his lungs when the Medics had to close a wound with quick clot.
I cannot comment on the Good Samaritan Laws in Canada (or any state other then Maryland for that matter) and what if any protection they might afford with respect to both criminal and civil liabilities, but many will not protect you if you exceed your level of training
and Scope of Practice.
What does that mean, while you may have had the training in the military, if you are not authorized (Scope of Practice - certification/license) by whatever governmental agency (Public Health Department, EMS, Medical Licensing Board) having the controlling legal authority and go ahead and implement a medical procedure or utilize a medic device on a person that exceeds your Scope of Practice, you may not be covered by the Good Samaritan Law. While it is unlikely (especially if the outcome is positive) you would be prosecuted or sued, the potential is present.
I certainly will not discourage you from using any medical procedure or medical device in a life threatening situation, just be aware of unexpected consequences of such actions.
Pete