The snare breakaway feature is just really a swaging tool where you join two pieces of wire together and the strength factor is by how strong the swage is done I have not made them this way yet as i would have to by the tool but they are required by law here.
On fire now that is something I am pretty good at no bic lighters required, the meathods I have had success with are flint and steel (easy), bow drill not hard once you understand the process, hand drill hard , hard ,hard but once you get the hang of it it too is not to bad but expect blisters. FIRE PISTON!!!!!!!! everyone should have one in each and every pack they own you can make them for a few bucks from modern materials. and all the mag bars and those types are pretty fool proof but i set the challenge to each and every one of you go to the woods and make a fire from materials you can gather.. it can be humbling but it also can be the difference between life and death.... I can show pictures of all these meathods if you guys want me too...