Shotgun Adapter 12 Gauge to 45 ACP - Gunadapters.com
The Utility of 12-Gauge Caliber Adapters, The Good, Bad, & Ugly -The Firearm Blog
Short Lane Gun Adapters Stack-N-Pack Kit: Turning a 12 Gauge into a Truly Versatile Weapon
The Utility of 12-Gauge Caliber Adapters, The Good, Bad, & Ugly -The Firearm Blog
12ga to 22LR rifled shotgun adapters Gunadapters - YouTube
Eagle Gun Range -Macon GA - X-Caliber Ammo Adapter Set for Shotguns. It's an 8-piece set of drop-in adapters that measure seven inches long each, and it comes with a carrying case.