Airsoft Marshmellow talks about certain Maxpedition bags that he says are the best Carry On bags for Airsoft Milsim... "Maxpedition is leading the way in tactical and practical for travel and organization. I wanted to give you an idea of how much you can really pack into them. I show case the IRONCLOUD™ ADVENTURE TRAVEL BAG 48L and the FLIEGERDUFFEL ADVENTURE BAG. Both are very close in size and are Carry On accepted. I would be only allowed one or the other as the carry on when using both bags on one trip, but with the amount of gear I had, was not much of a choice. Nonetheless, I am very impressed with how they held up and I highly recommend them."