Well, thanks for the effort of making that vid, well done. Is that a gas M4, or did you have any major problems with electricity and water?
It's highly unrealistic of course, but you probably already know that.
I'm keen on the idea of gbb assault rifles, but in the UK you'd get about a 2 - 3 month window of decent skirmishing, then have to go back to electric during the colder times.
I await the CO2 versions with interest...