Don’t see the need for a mag fed shotgun.
It’s a heavy mofo to begin with. And to carry all that extra ammo that weighs a ton compared to rifle rounds. Nahhhhhh
My HD 590A1 with a light and 5 rounds of 00 buck is like 10 pounds. Plus 7 round side saddle.
My Beretta OU shotgun is like 8 pounds unloaded.