Quote Originally Posted by Stuart View Post
I've been thinking of a way to put two magazine tubes next to each other on the bottom of a pump or semi-auto shotgun. I'm going for doubling the capacity without doubling the length. I figure if you have them side by side, it will reduce the angle needed to feed onto the lever, compared to if you have an over/under mag style.
SRM Arms did that at SHOT Show 2008...

http://www.youtube.com/watch?v=8tnuWf0xP20