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Purchase the NBS .223/5.56 Bolt Carrier Group – Black Nitride here!
The NBS .223/5.56 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 bolts 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. 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’t 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: 5.56x45mm NATO/.223 Rem, .300 Blackout
• 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
Take a look at our other AR-15 Parts here!
Advertised price expires 07/08/2021
About AR15Discounts.com Low prices, fast shipping, dedicated customer support, and quality parts from quality manufacturers. Reliability without breaking the bank, that’s our motto. AR15 Discounts is your trusted distributor of the best AR15 wholesale and discount parts on the market. Our staff members are hobbyists, just like you. We believe in the second amendment and work every day to keep our prices low to continue supplying hard working Americans with the tools they need to defend themselves. Give us a shot, you won't be disappointed. Our Shipping Promise Our goal is to ship your order within 24 hours and our guarantee is that we will ship within 72 hours (excluding weekends and holidays). This includes upper assemblies. So if you haven't received your tracking number within that 72 hour period, send us an email and we'll refund 5% back to your card for the inconvenience. On Returns Simple, if you're not happy, send it back. You agree to pay for return shipping, we agree to never charge a restocking fee. In certain cases where it is clearly our error, we will also pay for return shipping. To initiate a return, please email info@ar15discounts.com. On Privacy We don't sell, rent or give your information to anyone, ever, period. We will never disclose our customers' information to any government agency unless compelled by law and even then, not without a legal fight. Questions or concerns? Email us anytime: info@ar15discounts.com
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