Not to be overly nationalistic, but the US military is the only force in all the world that combines great numbers, training, and technology. You will find superior militaries in one or maybe two of the areas, but non have the balance the US has. Shotguns are poor combat weapons, they are heavy, limited purposed anachronisms. If we are playing Rainbow six and doing house clearings, shotguns are great, but in an open environment with some close quarter opportunities they should be considered more of a detriment... this is why they ignore basic functionalities of the platform in games. Don't get me started on the effects of moisture on shells v. cartridges.