The Brownells BRN AR-15/M16 5.56mm NATO Bolt Carrier Group (Model AZT-M4-556-ST-007) is a mil-spec M16-profile BCG featuring magnetic particle inspection (MPI) for verified structural integrity. Its nickel-boron finish provides enhanced corrosion resistance and reduced friction for smoother cycling and easier cleaning compared to standard phosphate-coated carriers.
Specifications
ManufacturerBrownells
Product TypeBolt Carrier Group
Caliber5.56 MM NATO
FinishNickel-Boron
Weight0.73 lb
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