A metal shell holder that holds two or three additional rounds to the side of the gun.
No
Probably WalMart
There is a ammo clip for a J C Higgins shotgun model 58324 16 gauge. You can buy it as a replacement part.
We carry new replacement magazines for that shotgun.
Need the maker of the shotgun
NUMRICH.com
Try e-gunparts.com, MidWay, Brownell's
$50-$90
Matters on the clip size that the shotgun comes with (or that you buy) it can be anywhere through 6 shells to 12.
Store brand shotgun with two barrels, side by side.
50-160
www.e-gunparts.com