Description
A*B Arms Pro 5.56 NATO Bolt Carrier Group – Nickel BoronA*B Arms is built stronger because sometimes, lives are on the line. Their products stand up to the rigors of combat, police and private security operations, where failure is not an option.The A*B Pro 5.56 Bolt Carrier Group is a MIL-SPEC drop-in ready component for the AR-15/M4 platform. The nickel boron finish offers dry lubrication for treated parts. The carrier, bolt, and cam pin require virtually no lube during use. The phosphate coated extractor has a surface finish providing superior extraction during firing. Crafted using high-end Swiss machinery for tight tolerances and finish.Features:BoltCarpenter 158 steelHeat treatedShot peenedMagnetic particle testedNickel boron coatedBolt carrier8620 steelNickel boron coatedNickel boron coated boreM16 cutGas key4130 steelNickel boron coatedProperly staked 4140 steel gas key screwsCam pin4340 steelHeat treatedNickel boron coatedExtractorAircraft quality E4140 steelHeat treatedShot peenedManganese phosphate coatedFiring pinAISI 8740 steelChrome coated
