Barrel: Rosco Manufacturing 10.5in 4150V Chrome Moly Vanadium steel barrel, chambered in 5.56 NATO, with a 1:7 twist, M4 barrel extension, and a Mid-length gas system. The barrel is finished with a .750" diameter low-profile gas block, WORKHORSE 9.5in M-Lok Free Float Rail, and an A2 flash hider.
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BATTLE ARMS Workhorse Upper Receiver Assembly 223/5.56 10.5"
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