Thats what I was thinkingCouldn't you get an old, used shotgun? Put a pistol grip on it. Make your own tube out of pvc pipe or buy a used case from army surplus? You could probably still buy 100 rounds of ammo to put with itfor less than that price.
buy a maverick 88 and put a pistol grip on it for $200
I was checking out that kit on the Mossberg website and was also contiplating the usefulness of it and in what possible scenarios it would be handy. In one picture it looked like it was broken down in a case and had to be assembled to use, that doesn't make much sense to me in a oh-crap-i-need-my-gun situation.
But if it was assembled and in a tube I could see it being good for in a camper or something. They show a guy hiking with it, but that is a lot of weight to be lugging around.
I think I am in the camp of buying a less expensive shotgun and modifying to my needs.
Couldn't you just carry a sling on any pistol gripped shotgun and be even lighter then with the case?