Chiappa X-Caliber 20 Gauge to .45 ACP Adapter Insert

The Chiappa X-Caliber Gauge Adapter Insert (brand part no. CF710405) lets a 20 gauge break-open shotgun chamber and fire .45 ACP ammunition, giving a single break-action gun real multi-caliber versatility. Chiappa machines the insert from blued steel with a fully rifled bore, which stabilizes the pistol-caliber bullet for genuine accuracy rather than 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. Loading is simple: drop the insert into the chamber, close the action, and the shotgun is ready to fire .45 ACP.

Key Specifications

• Adapts a 20 gauge break-open shotgun to fire .45 ACP ammunition.
• Measures 7.35 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 20 gauge shotgun; a manual extractor is recommended for this style of insert.

Does this insert stabilize the bullet? Yes, the fully rifled bore stabilizes the pistol-caliber bullet rather than letting it tumble.

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 20 Gauge to .45 ACP Adapter Insert

Running .45 ACP through a 20 gauge break-action adds another practical caliber option without buying a second firearm. Order it from our Lubbock, Texas gun shop for fast, direct shipping.