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Amazon.com : 360 Tactical 7.62x39mm Bore Sight Red Dot laser with four batteries-Boresight Sighting Caliber for Hunting : Sports & Outdoors
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
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Amazon.com : MOSANDON 7.62X39MM Red Dot Laser Bore Sight Cal. 7.62X39 Cartridge in-Chamber Red Dot Laser Boresighter with 2 Sets of Batteries ( 7.62X39mm) : Sports & Outdoors
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