Here is an example of an invention website where a poster presents the idea of a "Slide Release Buckle + Fire Starter", dated April 18, 2011.
The application in question is "Quick-Release Buckle with Fire Starting Components"(Publication Number: US20130189631 A1) by Michael John MOJICA claiming a priority to the U.S. Provisional Patent application submitted January 19, 2012, whereas claim 1 is as follows "A quick-release buckle with fire starting components..."
The image above is a screen shot from a page on http://www.hikepro.net describing the history of creating a buckle with a fire starter. It dates the invention to 2007.