Fall Build Fest Continues - 15% OFF GUN PARTS THIS WEEK
Use Code: PARTS15

1-DAY FLASH SALE - 20% Off Brownells Premium Gun Parts! Use Code: BROWNELLS20

308AR BOLT CARRIER GROUPS Reviews & Ratings

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.

View Product

Write a review

2 Stars

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.

Sort by Filter by rating

Fast ship

Looks good, got good reviews. Haven't had a chance to test it yet...

by ELDON B. on December 22, 2023

Verified Purchase

Was this review helpful? 0

BCG

The bolt carrier group seemed to be very well put together, but it needed to be greased very tight

by MICHAEL Y. on December 07, 2023

Verified Purchase

Was this review helpful? 1

Works

This is my first experience with an AR308 and all I really know is that it chambers, shoots and ejects like it should. It's a little stiff to pull out of battery, but I'm hoping that's just the tight fit that needs to be broken in.

.308 nickel boron BCG

I have three of these and the latest one would not cycle. Checked gas system and it was GTG so I examined BCG. Tried other two BC's in upper and they worked. Removed carrier key and found carbon deposits and no gasket sealant. replaced key, used Permatex gasket seal and thread locker on screws installed to 50 inch pounds. Now it works just fine. I purchased another sources BC and after 18 rounds it stopped cycling as well. Removing key I found solvent collected under it and again no sealant so I replaced it as I did above, have yet to test fire. Also, both BCG's passed the gas ring test. My concern is that the supplier for Brownells and ****** has a quality control problem. Aside from this , love Brownells!

Works great

Giving 4 stars because when reading reviews about bcg online i saw that i overpaid for it, most people both these on sale or with coupons and paid a lot less than i did. But it still runs great in my aero m5, zero issues so far.

Bang for the buck BCG

This bolt will work for those wanting to run 6.5 Creedmoor. The firing pin hole measured .70. The finish is nice however I noticed some mill markings on the top of the BCG just in front of and below the gas key that I wasn't very happy about but I can live with. Overall A really good BCG and if need be I would buy one again.

Know what it fits

I bought headspace gauges for the first time ever with this BCG. It fits and is correctly headspace for Faxon .308 and 6.5 barrels, and also fits a Troy .308 and a Bushmaster .308 barrel. It will NOT even close in an Aero Precision barrel.

Decent for the money

I purchased the BCG for a build off an Aero Upper and Lower set. The BCG is nice for the money, however my gas key hole was .007" undersized which resulted in the destruction of a gas tube. Fortunatly I had a reamer (.1805") for gas tubes and was able to use the reamer to bring the gas key into spec. I chambered and headspaced the barrel to this bolt with no problems and once I get the kinks worked out I believe this rifle will be very reliable and long lasting. Overall I am happy with the bolt due to its price point and decent quality. I believe I got a gas key that simply had a little build up of NiB in the bore causing it to be out of spec. I spoke to tech support about this issue and they were very helpful and willing to exchange it immediately, however I want to try and make this one work due to my barrel being headspace to this bolt.