Chiappa X-Caliber 12 Gauge Rifled Adapter *Choose Caliber NZ - Shotgun Parts by Gun City
Could the use of 'adapters' which fit into the chamber and swapping of the bolt, extractor and other parts allow firearms to use different calibers as long as the new cartridge is
What are Shotgun Adapters? - Shotgun Adapters - https://chaszel.com