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BRN AR-308 308 Caliber Bolt Carrier Group Nitride

BRN AR-308 308 Caliber Bolt Carrier Group Nickel Boron

BROWNELLS - BRN AR-308 308 Caliber Bolt Carrier Group Nickel Boron

57 Reviews

Finish

Nickel-Boron
Black Nitride

BRN AR-308 308 Caliber Bolt Carrier Group Nickel Boron

Brownells #

078000392

MFR #

308AR BOLT CARRIER GROUP NIB

UPC

050806112391

$177.99

Purchase Limit

Out of Stock

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Can we ship this to you? (US only)

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International purchase information

Specifications

Carrier Type:

M16

Color:

Silver

Finish:

Nickel-Boron

Cartridge:

308 Winchester

Material:

Steel

Make Model Fit:

AR-308.Universal

Quantity:

Restriction

Restricted Part:

Yes

View US State Restrictions

Can we ship this to you? (US only)

How To Buy Guns Online

International purchase information

What is the BROWNELLS - BRN AR-308 308 Caliber Bolt Carrier Group Nickel Boron?

308 AR BOLT CARRIER GROUPS

The Brownells Complete .308 Bolt Carrier Group is designed to operate reliably in DPMS LR-308 pattern rifles chambered in .308, .243, 7mm-08, .338 Federal, .260 Remington, 6.5mm Creedmoor, or any other cartridge based on the .308 Winchester. These BCGs are manufactured to the same uncompromising standards as our M16-style BCGs. Our Complete .308 Bolt Carrier Group has a bolt machined from robust 9310 steel, heat-treated and shot-peened for superb hardness. The carrier itself is fabricated from hardened 8620 steel. Both are magnetic particle inspected (MPI) to make sure there are no hidden microscopic flaws that could lead to premature failure.

Carrier has forward assist notches
Extractor is installed with rubber insert and spring
Gas key screws are torqued and staked
For use in DPMS LR-308 pattern upper receivers only; NOT compatible with Armalite rifles

You can get the Brownells Complete .308 Bolt Carrier Group with a hard Black Nitride finish that is exceptionally resistant to surface wear OR a Nickel Boron coating (a dull matte silver) that’s even harder and self-lubricating to boot. Both come complete with firing pin, firing pin retaining pin, cam pin, gas rings, gas key, extractor, and ejector installed. Brownells GunTech™ Note: Unlike BCGs with a traditional Parkerized finish, the carrier on our Black Nitride bolt carrier group is not hard-chromed inside because Nitride is actually harder than industrial chrome plating.

Restricted Part
Please check with your state regulations for ownership of Restricted Parts. May require documentation.

Available options

Image	Description
	BRN AR-308 308 Caliber Bolt Carrier Group Nickel Boron UPC: 050806112391
	BRN AR-308 308 Caliber Bolt Carrier Group Nitride UPC: 050806002395

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308AR BOLT CARRIER GROUPS REVIEWS

4.3

57 Reviews

5 Stars

68%

4 Stars

14%

3 Stars

2 Stars

1 Stars

11%

Reviews Summary

The Brownells 308AR Bolt Carrier Group receives mixed reviews; many praise its quality, finishing, and functionality while others report issues with extraction and headspace. Some users also highlight price concerns. Quality assurance and consistency seem areas needing improvement, but overall, many find it a solid choice for budget builds.

What Reviewers Are Saying

Product Quality

70%

Reviewers frequently praise the overall quality and finish of the BCG, noting its durable construction and functionality with various loads. Many feel that the product's quality rivals that of much more expensive models, making it appealing for those on a budget.

Performance Issues

45%

A significant number of reviewers encountered recurring performance issues related to extraction and headspace with certain barrels. Some reported that the BCG failed to cycle, leading to jams and ejection issues, which raises concerns regarding inconsistency in quality control.

Value for Money

50%

Several customers appreciate the competitive pricing of this BCG, feeling it offers excellent value, particularly during sales. However, some express dissatisfaction over perceived price discrepancies after purchase, influencing their overall impression.

Customer Support

30%

A number of users mentioned positive interactions with customer support, particularly in resolving issues related to their BCG. This includes assistance with troubleshooting and RMA processes after encountering problems, suggesting that the support team is responsive.

Compatibility Concerns

40%

Many reviews noted variability in compatibility with different AR-308 setups. Some customers reported successful fits while others faced significant issues during headspace checks, underscoring the importance of verifying compatibility with specific builds.

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Just what I was looking for.

I chose this Nitride BCG because I wanted a bolt with a .070" firing pin hole and the appropriate diameter firing pin. That's it. If it didn't, I would have returned it and looked elsewhere. The fact that it's identical to my Aero Precision BCG without the logo, that much better. I just wish Brownell's would have listed the above specs in the description.

Would you recommend this? Yes, I would recommend to a friend

by Mike D. on April 09, 2025

Verified Purchase

Was this review helpful? 2

Great BCG for the Money

What a great product, lot of people don't like to finish color of nickel boron even though it's a little harder than black nitrited steel. I would highly recommend it I feel like you're getting a lot for the money it works really well great quality steel made in USA.

Affordable BCG

Great product, priced right for LR308 budget build.

6.5 Creedmore BCG

Nice looking. Have not fired it yet. Purchased a second one. That one is lost in shipping. Still waiting for customer service to figure it out. Own several in nitride, I went with the nickel coated for $20 more this time. I own several of Brownells BCGs. No issues.

308AR Bolt Carrier Group 308 Win Nickel

Purchased two of them, one to use with a bargain priced 308 barrel and one with a higher-end 6.5 Creedmore barrel. Seem to be quality materials that fit and function well in each rifle. I like the finish. Both bolts head-spaced well in the high-end Creedmore Barrel, but not in the bargain 308 barrel. Had to use a different bolt to properly head space in the bargain priced 308 barrel.

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Customer Questions

0 Questions

BROWNELLS - BRN AR-308 308 Caliber Bolt Carrier Group Nickel Boron

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308AR BOLT CARRIER GROUPS REVIEWS

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