Went to a buddies place this weekend and had a little fun. Warning the video does have some light cursing that you might expect when someone witnessness a large explosion. Tannerite, oxygen tank, and propane tank were all shot with an AR.
http://www.youtube.com/watch?v=3i2BjUFbeng
http://www.youtube.com/watch?v=3i2BjUFbeng