Features:
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Machined from 4140 Chromoly steel
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Heat treated and thermo stress relieved
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7.5” length
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Button rifled with a 1-7 twist
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Chambered in 5.56x45mm NATO
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Precision air gaged
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Mil-spec M4 feed ramps
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.073-.075 gas port
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Threaded ½-28 muzzle
SPECS: Fits standard AR15/M16 receivers. 4140 Steel construction, matte black finish.