Processing of Niobium-Lined M240 Machine Gun Barrels

Abstract

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Fabrication and Tests of M240 Machine Gun Barrels Lined with Stellite 25

“…For the past several years, the US Army Research Laboratory (ARL) has been developing a process by which refractory metal liners can be attached to steel gun barrels. [1][2][3][4][5][6] This process, known as Gun Liner Emplacement with an Elastomeric Material (GLEEM) has been used, along with hammer forging, to emplace niobium liners in M240 machine gun barrels. 7 The combination of GLEEM and hammer forging produced a composite barrel whose liner stayed in place during an aggressive firing schedule.…”