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Since we have no access to real MAPP gas or solid fuel breach cartridges now, I and several other guys here carry THERMAL LANCES in our work and bugout kits. They are 2 feet long steel brake lines or steel arrow shafts stuffed with steel wool down their cores and fitted onto the end of an oxypropane torch gun and fired by these 1oz portable O2 brazing canisters. Light the steel wool at the business end with a regular lighter and once the flame takes, turn on the O2 flow and adjust until you get a spearhead shaped, blinding white-purplish flame burning absolutely clean with almost no smoke. That is a 7800°F breaching jet capable of cutting through ANY obstacle in an emergency. Careful, that flame is emitting a lot of energy in the UV spectrum so try to minimize your skin and eye exposure to it if you are using in an energency with no protective gear. When we are using ours at work to cut various metal stuff at worksites, all precautions pertaining to welding applies. A simple thermal lance is enough to let you get people to safety through a previously barricaded area in the event of a fire, flash flood, or active shooter situation. And just based on normal current events, it seems that a breaching tool like a thermal lance should belong in every able person's survival kit and a converted torch kit is small enough to fit into a niche in any work duffel or tactical backpack. A 1oz O2 cylinder will give you enough oxy for 5 minutes of full powered blasts and each arrow shaft "fuel cartridge" will give you decent enough burn time depending on your O2 flow that will be sufficient to cut a window right around the lock mechanism of a commercial walk in freezer like the one an Arby's manager was accidentally trapped in and froze to death last year. Just be aware that the fuel rod is burning downward at a steady pace and when it reaches about 2 inches from the torch head, discard and replace with a new rod so your torch doesn't get damaged.
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