NBS AR-15 9310 Bolt Assembly - Black Nitride
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MSRP $54.95
MPN 51015
UPC 999996290
Description
Made from 9310 Steel which has a high core hardness and high fatigue strength unlike standard Hot/cold rolled 9310 steels. This is a Mil-Spec bolt assembly with enhanced features for those looking to complete a bolt carrier group. This bolt will make sure your gun outshines the competition- Fully Assembled 5.56/.223 Caliber Bolt- Shot Peened- MPI (Magnetic Particle Inspected)- HPT (High Pressure Tested)- Power Spring Kit- Nitride QPQ Treated- MPI/9310 ENGRAVINGS WILL VARY BY BATCH