Chiappa X-Caliber 12GA/20GA Gauge Adapter Insert - 8 in Rifled Blued

The Chiappa X-Caliber gauge adapter insert lets a 12 gauge break-open shotgun chamber and fire 20 gauge shells. Drop the blued steel insert into your single-shot or break-open action and the shotgun instantly gains an 8 inch fully rifled barrel — ideal for slugs and the milder-recoil 20 gauge payload.

Built from steel with a classic blued finish, the X-Caliber measures 1.85 x 2.30 x 9.10 inches overall and is designed for use with any break-open shotgun (a recommended extractor makes ejection smoother). Loading and extraction are manual: simply open the action, eject the spent shell, and reload. This is a true drop-in conversion kit — no permanent modifications to your shotgun required.

Whether you're a hunter looking to extend the utility of an existing single-shot or a sport shooter experimenting with shorter, rifled formats, the Chiappa X-Caliber 12GA to 20GA adapter is a compact, purpose-built accessory that turns one break-open shotgun into two.