An adapter for converting the receiver of a rifle to one which receives a cartridge housing rounds of a shorter length, said adapter comprises a body defined by four walls two of which walls defining the front and rear walls of the adapter and two of which walls defining {HEAD ~ left and right side walls} of {TAIL ~ the adapter} 
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An adapter for converting the receiver of a rifle to one which receives a cartridge housing rounds of a shorter length , said adapter comprises a body defined by four walls two of which walls defining the front and rear walls of the adapter and two of which walls defining { HEAD ~ left and right side walls } of { TAIL ~ the adapter }
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