So I was thinking about all of the over under rifle shotguns made and all the combo's out there. I was wonder if anybody made a AR platform with a 12 gauge shotgun under it. I know the military has a grenade launcher under there rifles but that would be just a little to much. If you where calling and the varmint got into the brush you could use the shotgun at a reasonable range but if you had to reach out and touch them then the AR would fit the bill. I don't know how well the shotgun would work because of the short AR barrels are. I tried to look on the net but came up empty. I'm sure there is a custom shop out there that has one just like to see if it exist.