12 gauge to .22 LR Pathfinder Series | 12 gauge, Survival, Gauges
X-Caliber Shotgun Gauge Adapter System
Shooting 9mm Out Of A 410 Shotgun - It Is About Having The Right Tool
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.