FailZero 5.56 Full Auto Bolt Carrier Group
UHFZM16401NH
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FailZero 5.56 Black Nitride Bolt Carrier Group
UHFZNITRIDENH
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FailZero 5.56 Full Auto BCG Black
UHFZM16401NHBLK
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FailZero Lightweight Bolt Carrier Group 5.56
UHFZLWBCG01NH
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FZ 9mm Black Nitride AR9 Bolt Carrier Group
UHFZ9MMBCGBLKNIT
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