Brn-180 Gen 1/2 Complete Bolt Assembly
$111.99 at Brownells
In stock Sale
NBS Lightweight .223/5.56 Bolt Carrier Group - Black Nitride
No ratings yetBest price
$109.95at AR15Discounts
checked Oct 31, 2026
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| AR15Discounts Best price | $109.95checked Oct 31, 2026 | Check store | Buy at AR15Discounts | |
| Dirty Bird | $139.99checked Oct 31, 2026 | Check store | Buy at Dirty Bird |
Prices and availability change often, so confirm on the store's site before you buy. We may earn a commission from these links.
Price history
Dashed line = out of stock. Tracking since Oct 28, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| AR15Discounts | $109.95 | $109.95 | $109.95 |
| Dirty Bird | $139.99 | $139.99 | $139.99 |
Since Oct 28, 2026.
About this part
The NBS Lightweight .223/5.56 Bolt Carrier Group - Black Nitride is a 5.56 / .223 bolt carrier group from NBS. It's sold by 2 stores, from $109.95 to $139.99.
Fits and works with
- Caliber
- 5.56 / .223 · Shop matching ammo
- Bolt
- Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups
Specifications
- Manufacturer
- NBS
- Platform
- AR-15
- Caliber
- 5.56 mm NATO
- Finish
- Nitride
- Material
- Steel
From the manufacturer
The NBS Lightweight 5.56/.223 Nitride Bolt Carrier Group for the AR-15 platform is precision made to MIL-SPEC standards using the highest quality materials and machining available. By reducing the mass of the BCG, felt recoil is diminished, allowing you to stay on target for more accurate shooting. The NBS Lightweight BCG is perfect for competition/3-gun applications when paired with an adjustable gas block and a lighter buffer! The carrier is made from 8620 tool steel and is paired with a 9310 steel bolt. The carrier and bolt are then treated with a nitride finish to ensure longevity. Features: AR-15/M4 BCG .223/5.56 NATO Black nitride finish Magnetic particle inspected 9310 steel bolt Case hardened 8620 tool steel heat treated carrier Properly staked gas key Grade 8 fasteners 4140 steel cam pin Shot peened tool steel extractor MADE IN THE USA
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