Eh... I've always been skeptical about anything shown on Futureweapons.
The tests they put the Heckler & Koch 416 didn't look so vigorous. When they fired it 'full of sand' when they 'buried' it (for about four seconds) the bolt was closed and the magazine was fully inserted. When they fired it 'full of water' the water looked as clean and clear as bottled water (something I doubt you'd see on the battlefield) and again the bolt was closed. Then they showed shots of them shooting it. And then they showed cool shots of soldiers advancing with it while playing cool-sounding progressive rock music in the background for the rest with some guy with a cool announcer voice speaking over it. That hardly sounds like a true test of the rifle's capabilities, more like some lame TV show.
Call me a skeptic, but that's what I am.
- Dave.