NBS Lightweight .223/5.56 Bolt Carrier Group - Nickel Boron

Name: NBS Lightweight .223/5.56 Bolt Carrier Group - Nickel Boron
Brand: NBS

NBS · Bolt Carrier Group

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Best price

$129.95at Dirty Bird

Sale checked Oct 31, 2026

Buy at Dirty Bird

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Where to buy

Store	Price	Availability	Buy	Add to build
Dirty Bird Best price	$129.95Salechecked Oct 31, 2026	Check store	Buy at Dirty Bird
AR15Discounts	$139.95checked Oct 31, 2026	Check store	Buy at AR15Discounts

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

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Dashed line = out of stock. Tracking since Oct 28, 2026.

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Store	Latest	Lowest	Highest
AR15Discounts	$139.95	$139.95	$139.95
Dirty Bird	$129.95	$129.95	$129.95

Since Oct 28, 2026.

About this part

The NBS Lightweight .223/5.56 Bolt Carrier Group - Nickel Boron is a 5.56 / .223 bolt carrier group from NBS. It's sold by 2 stores, from $129.95 to $139.95.

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: Nickel Boron
Material: Steel

From the manufacturer

The NBS Lightweight 5.56/.223 Nickel Boron 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 nickel boron finish to ensure longevity, increase lubricity and make cleaning a breeze. Features: AR-15/M4 BCG .223/5.56 NATO Nickel Boron 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