Beyond "MIL-SPEC" Hughes Ballistics delivers the best options available for our customers.
Major improvements include using 9310 tool steel for the bolt, nitriding the assembly to increase surface hardness, increase lubricity, and provide superior corrosion resistance compared to typical chrome and phosphate bolt carrier groups. All bolts are fully MPI tested to ensure the material is without defects.
9310 Steel Bolt, 8620 Steel Carrier
Heat treated per Mil Spec for core hardness
Magnetic Particle Inspection (MPI)
Back of Lugs Chamfered for Reliability
QPQ Nitrided Bolt & Carrier for case hardening & lubricity