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Daniel Defense Castle Nut 15-057-20039

SKU 15-057-20039-DD

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Secures MIL spec and commercial spec carbine receiver extension and rear receiver end plate to the lower receiver. Constructed with recesses for staking the rear receiver end plate to prevent the castle nut from coming loose.


  • Item ConditionNew
  • UPC815604018975
  • MPN15-057-20039

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