NBS .223/5.56/300 BLK Complete Bolt Carrier Group – Nickel Boron
- M16 style (Auto)
- Machined from 8620 tool steel
- Heat treated to mil spec
- Machined from 9310 tool steel
- Heat treated to military specifications
- Shot Peened
- MPI (Mag Particle Inspected)
- Machined from 17-4 Stainless Steel
- Heat treated to mil spec
- Machined from S-7 shock resisting tool steel
- Heat treated to mil spec
- Shot peened
- Extractor spring is made of stainless steel music wire
- Machined from 17-4 stainless steel
- Heat treated to milspec
Specifications
- Weight:Â 11.6 oz
- Length: 7.5″
- Finish: Â Nickel Boron (NiB)
- USA Made
- Covered by NBS Limited Lifetime Warranty
NBS — Our In-House Brand for Builders Who Demand Reliable Performance and Real Value.
Designed for builders who demand reliable performance and real value without unnecessary hype or inflated pricing. NBS stands for "No Bullshit."
Built on Strong Industry Partnerships
Through the strong partnerships AR15Discounts has built with trusted suppliers and vendors, we regularly gain access to premium components often manufactured by or for leading industry names. By purchasing these in volume, we bring them to you under the NBS label, ensuring proven quality reaches your build at a fair price, without the added cost of extensive marketing.
Quality You Can Trust
Every NBS product is specified to the exacting standards we apply to our own rifles. Each component features precision CNC machining, American-made key components where it counts, robust materials, dependable steels, and durable finishes engineered for long-term reliability. These items are either sourced from reputable OEMs or carefully assembled in-house using established name-brand elements, maintaining consistent excellence throughout the lineup.
Complete Solutions for Serious Builders
From stripped and complete uppers to bolt carrier groups, handguards, lower parts kits, and beyond, NBS provides a unified, affordable selection that allows you to complete confident, high-performing builds.
Backed by a Limited Lifetime Warranty
All NBS products come with our Limited Lifetime Warranty for the original owner, covering defects in materials and workmanship. AR15Discounts stands firmly behind these parts because, as shooters ourselves, we use and trust them, delivering honest value and gear you can rely on.
| Weight | 0.3270 oz |
|---|---|
| Options | w/ Logo, w/o Logo |
| Bolt Material | 9310 Steel |
| Finish | Nickel Boron |
| Cartridge Compatibility | .223/5.56 NATO/.300 BLK |
| Carrier Profile | M16 |
| High Pressure Tested | Untested |
| Magnetic Particle Inspected | Magnetic Partical Inspected |
| Platform | AR-15 |
| Bolt Finish | Nickel Boron |
| MPN | Star Logo,BCG-NIB |
| UPC | 999994487, 999992572 |
Compliance
NFA (National Firearms Act) compliance is crucial for legal ownership and transfer of regulated firearms and accessories like short-barreled rifles, suppressors, and certain types of ammunition, ensuring adherence to federal regulations to avoid legal penalties and ensure responsible firearm ownership.
Customer Reviews
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United States
Works
Works as it should
United States
NBS Top Notch
I usually don’t writ to many reviews. I have had this BCG for a few years and have many from other manufacturers. I have to say that this is the nicest fit and finish over time. I think I have 10 BCG all together. Last few have been on sale from known manufacturers and don’t hold up to the finish on this NBS. Buy with confidence.
USNice BCG
This not only functions well it also adds a little flair to your build!
USNice bcg
Ran smooth. Looks grear
USNBS bolt carrier group
This product fit perfectly in my AR. Has worked as expected. Easy to clean.
