The Chiappa X-Caliber Gauge Adapter Insert (brand part no. CF710372) lets a 12 gauge break-open shotgun chamber and fire .380 ACP ammunition, turning a single break-action gun into a versatile multi-caliber tool. Chiappa machines the insert from blued steel with a fully rifled 9-inch bore, which stabilizes the pistol-caliber bullet for real accuracy instead of the tumbling pattern a smoothbore insert produces. It’s built for use with any break-open shotgun and pairs best with a manual extractor recommended for this style of insert. The process is simple: drop the insert into the chamber, close the action, and the shotgun is ready to fire .380 ACP.

Key Specifications

• Adapts a 12 gauge break-open shotgun to fire .380 ACP ammunition.
• Measures 9 inches long for a genuine rifled-barrel insert.
• Bore is fully rifled, stabilizing the bullet rather than letting it tumble.
• Machined from blued steel for durability and a traditional finish.
• Fits any break-open shotgun.
• Uses manual extraction rather than an automatic ejector.

Frequently Asked Questions

What shotguns does this fit? Any break-open 12 gauge shotgun; a manual extractor is recommended for this style of insert.

Does this insert stabilize the bullet? Yes, the 9-inch bore is fully rifled rather than smooth.

How does extraction work? This insert uses manual extraction rather than an automatic ejection system.

Find more shotgun adapters and parts in our other shotgun accessories & parts category from Chiappa Firearms.

Buy the Chiappa X-Caliber 12 Gauge to .380 ACP Adapter Insert

A break-open shotgun with a stable of X-Caliber inserts handles far more than one caliber ever could on its own. Order it from our Lubbock, Texas gun shop for fast, direct shipping.