Chiappa Firearms 20GA 9mm Caliber Conversion Kit. 7in long rifled on the inside it comes handy to use 9mm in your 20GA (only break action shotgun). A lip in the design secures cartridge extraction so it can be removed easily. Specifications for Chiappa Firearms 20GA 9mm Caliber Conversion Kit: Manufacturer: Chiappa Firearms Color: Black Finish: Blued Fabric/Material: Steel Gun Make: Universal Gun Model: Universal Caliber: 9mm Luger Magazine Capacity: 1 Round Magazine Included: No Condition: New Gauge: 20 Package Contents: Chiappa Firearms 20GA 9mm Caliber Conversion Kit The Chiappa Firearms X-Caliber 20ga/9mm Gauge Adapter Insert is a quality addition to the Chiappa Firearms lineup. For more great deals on Gun Parts by Chiappa Firearms please browse our Chiappa Firearms Gun Parts page. What firearm models does the manufacturer say Chiappa Firearms 20GA 9mm Caliber Conversion Kit is compatible with? The manufacturer says that Chiappa Firearms 20GA 9mm Caliber Conversion Kit is compatible with UniversalChiappa Firearms 20GA 9mm Caliber Conversion Kit