I was wondering if you guys with more AR experience than I could help me out with this.
I'm sure many of you have seen this video of the HK 416 vs. Colt AR-15:
At about 1:25, the Colt blows up after being submerged in water.
I figure, ok, it blew up because there was water in the gas tube, causing over-pressurization and a catastrophic malfunction.
Now watch this video: http://www.youtube.com/watch?v=unYAcHIUhXE
It passes the test perfectly, also being a DI AR-15.
Now, is it because the guy in the second video waiting an extra second before firing? Is it because he cycled the action before firing? I'd like to hear your guys' input.