30-06 to 32ACP Rifle Adapter - Chamber Reducer - Stainless
Gun Adapter
Shoot any round through any firearm with subcaliber adapters - Carolina Sportsman
these are shotgun adapters aka chamber reducers aka shotgun inserts and called by a few other names. they allow you to fire lower gauge (caliber) shotgun shells out of a larger bore
Wood Trekker: 12 Gauge Shotgun Chamber Adapters: The Good, The Bad, and The Ugly
Gamo Viper Express .22 Cal Chamber Adapter | Airgun Depot
Auxiliary cartridges By any other name, still twice the fun - TheGunMag - The Official Gun Magazine of the Second Amendment FoundationTheGunMag – The Official Gun Magazine of the Second Amendment Foundation
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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
12ga to 38special adapter at 50 yards - YouTube
30-06 to 32ACP Rifle Adapter - Chamber Reducer - Stainless