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