Proof Research Barrel AR-15 6mm ARC 20 1 7.5 Twist Rifle Length SS

Proof Research's steel barrels are produced in-house from double-stress relieved 416R stainless steel. This pre-hardened chromium steel is ideally

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Proof Research AR-15 16 Stainless Steel 6MM ARC Barrel, Rifle-Length

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Proof Research AR-15 18 Stainless Steel 6MM ARC Barrel w/ Gas Tube

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Proof Research 6mm ARC 1-7.5 twist Stainless Steel Rifle Length .750 Barrel

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