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FailZero Bolt Carrier Group with Semi Automatic Hammer, nickel, fits M16/4


*Is ONLY to the LOWER 48.
Not Alaska/Hawaii/ PR/Guam/Thailand, etc


FailZero Bolt Carrier Group With Hammer, Completely Assembled, EXO Coated, Fits M16/4, Nickel Finish FZ-M164-01-SAH


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