Post-Apocalyptic Scrounged-Glass Arrowheads

I'm a bit embarrassed to say that I never thought of people using scrounged glass for arrowheads! Doing a bit of research it seems that bowhunters view these type of arrowheads as inferior to flint but superior to obsidian in terms of durability. Here's a cool video of a guy making a scrounged-glass arrowhead using flint-knapping techniques.