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I was very much impressed by the KSG, which is a 12-gauge bullpup shotgun with 14+1-round capacity:
Here is the two-tone (black and OD) version:
The photo below is of the bottom ejection port, which shows the three-position magazine tube selector which is at its forward edge:
The current word is that it is legal in California, and will be available in third-quarter of this year.