The round cylinder-looking thing appears to be part of the gas regulator off of a BREN (or possibly a BESA) MG; there should be a series of four differently-sized holes around the outer edge regulator, and an extension off the frame would fit into those rectangular slots to lock the regulator in place once the barrel is locked down.
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Gun control in Canada: making the streets safer for rapists, muggers, and other violent criminals since 1936.
Last edited by SDC; August 17, 2011 at 08:03 PM.
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