I have a rare and discontinued NIB Knoxx Sidewinder Kit, the orginal box they first sent out and the follow-up box with the upgrade and the drum magazine.
It comes with the drum, and I think four box mags. I know there are at least three box mags, but I think there is also one still in the original
Maybe you didn't see the other picture, the drum is in the box:
Price drop to $450.
$400 or it goes on my 590 and I shoot the shit out of it.
If it comes with at least 3 box bags and one drum mag, I am interested. If the kit is still available, please let me know.