Rossi has a youth model .410 shotgun single shot with an extra .22LR barrel for plinking. I mounted a short picatinny rail under the foregrip to which a vertical foregrip is attached. Then I used industrial strength velcro (you fidn it in LOWE'S or Home Depot) to attach the felt side to the butt stock and the hook side to a strip of cartridge holder cut from an elastic butt sock for rifles. The strip of eight or nine rounds of slug or #2 shot can be kept separate from the weapon (which should be stored put together in .410 22 inch barrel mode with vertical foregrip attached) but brought to battery swiftly, with reloading easy from the strip of shells. I also attached a laser to the barrel, so the lady (she's small) can shoot reliably from the hip. You hold the shot gun with both hands, but hold it with the vertical foregrip while reloading.
And you can buy the youth model at Wal Mart fro around $150, then add the rail, butt stock cartridge holder, and vertical foregrip for around fifty bucks. Practie shooting and reloading using regular bird shot .410. The little 22LR barrel is 16 inches and the shotgun barrel is 22 1/4 inches. Nice rig for home defense where children are in the home. One caution: do not try to shoot Taurus Judge .45 long colt rounds through the shotgun, even though you can load the Taurus Judge .410 #4 shot rounds in it. BUT, the .41o slugs are just about the same effect and they can be shot through the full choked shotgun barrel.
If there are no children to worry about, the butt sock for hunting rifles works well to store .410 shells&slug rounds on the Rossi youth model shotgun.