AR-15 7.62X39 Bolt Carrier Group (BCG) Black Nitride

DESCRIPTION

The NBS 7.62x39_Black Nitride Bolt Carrier Group was designed with strength in mind. Starting with a 9310 Steel Bolt, which is aircraft-grade material, this bolt has a high core strength rating, a high fatigue strength, and a high hardenability rating. 9310 steel, when treated properly, is about 7% better than Carpenter 158 steel, so you know that you will have a dependable BCG, when you drop this into your rifle.

This NBS BCG (Bolt Carrier Group) has been Nitrided, so that it can provide a long-lasting experience, and_provide a significant upgrade to your AR-15. These BCG__ have also been Magnetic Particle Inspected and have been made to Mil-Spec Standards._It also has_Mil-Spec 8740 Steel hard-chromed Firing Pins, Mil-Spec Gas Keys with Grade-8 screws that are staked and sealed with Permatex No.3, and they have shot-peened case-hardened D2 tool steel extractors._Plus, with the AR15Discounts satisfaction guarantee, you can buy your AR build components without apprehension. Our guarantee says if you are unhappy for any reason, you can send it back to us within 30 days for a full refund. No worries.

NOTE-_The Salt Black Nitride BCG offers the dark, subdued finish that doesn__ change the specs of the Bolt Carrier, but it still makes the outside of the Bolt Carrier harder. This treatment increases the longevity of the part, makes it extremely wear resistant and durable, and this treatment protects the part from corrosion.

Technical Specs:
_��_ _Gas system: Direct Impingement
_��_ _Caliber: 7.62x39
_��_ _Finish: Salt Black Nitride
_��_ _Bolt: 9310 Alloy Steel (High Hardness)
_��_ _Carrier: 8620 Aircraft Grade Steel
_��_ _Extractor: Shot Peened and Case Hardened D2 Tool Steel
_��_ _Firing Pin: Mil-spec 8740 steel with hard chrome finish
_��_ _Gas Key: Mil-Spec w/ properly staked Grade-8 screws & Permatex No. 3 sealed
_��_ _Cam Pin: 8620 Steel w/ Black Nitride Finish
_��_ _Quality Control: MPI Inspected for QC

WARNING:

WARNING: This product can expose you to chemicals such as lead and other petroleum products which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm.

For more information go to_https://www.p65warnings.ca.gov