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DTIC AD1008453: Fabrication and Tests of M240 Machine Gun Barrels Lined with Stellite 25

Two M240B barrel blanks were processed with the Gun Liner Emplacement with an Elastomeric Material procedure. The liner material was Stellite 25, a cobalt-chromium alloy. The liners were made by the flow-form process. The lined blanks were sent to FN Manufacturing, Columbia, South Carolina, for hammer-forging and final machining. Firing tests of the 2 barrels were successful, with no liner movement observed. Firing tests at high rates of fire need to be conducted to determine both wear and integrity of the liner.

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