How prepared will you be when ammo runs scarce? Your gun is only useful for as long as your ammunition supply lasts. And any spare ammo won't be good if you aren't carrying a gun that will fire it. Adapters come in a sturdy and convenient canvas carry pouch that can be easily stored. They are pistol-length and now made exclusively of stainless steel! Each adapter comes fully rifled for deadly accuracy. Our Extractor-Grip cutout feature allows for removal of spent shells while o-ring retention keeps the adapter in the chamber. you can shoot any of the following ten calibers from your 12 ga shotgun: 12ga, 20ga, 410 bore, 45 Colt, 44 Mag, 45 ACP, 38 Special, 357 Mag, 9mm, 22 Mag, and 22 LR. It is the perfect solution for firepower versatility.