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The bolt assembly is machined from the correct Mil-Spec Carpenter No. 158® steel, shot peened for increased strength, includes tool steel machined extractor and ejector, BCM Extractor Spring, and is HPT (High Pressure Tested) and MPI (Magnetic Partical Inspected).
Milspec Carpenter No. 158® steel MPI Bolt (Magnetic Particle Inspected) Shot Peened Tool Steel Extractor BCM Extractor Spring Black Extractor Insert Mil-Spec Crane O-Ring
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