Today you can customize your firearm as you wish. Make it stronger, more durable, more accurate, or less noisy with the help of additional components: sights, grips, fire control groups, and so on. You can even make it use the caliber you want.

Best 308 BCG - Editor's Choice

So today we are going ta talk about .308 bolt carrier groups for your custom AR-10 or AR-15. This part is needed to actually shot .308 rounds that will make your rifle even more powerful. Is it complicated to find the best model on the market? Yes, it is! Everything depends on your necessities, budget, and preferences. Moreover, it’s complicated to look through this huge variety of models to find a suitable one. It takes a great amount of time, which is not appropriate for many people. That’s why we have made this list of the top 14 BCGs for you.

Best 308 Bolt Carrier Group | TOP-15 308 BCG

ImageProductBrand
Aero Precision .308 Black Nitride BCGAero PrecisionBUY
JP Enterprises Complete JPBC Bolt Carrier GroupJP EnterprisesBUY
Spikes Tactical .308 Bolt Carrier GroupSpikes TacticalBUY
Ballistic Advantage .308 Bolt Carrier GroupBallistic AdvantageBUY
Faxon Firearms .308 9310 Bolt Carrier Complete - NitrideFaxon FirearmsBUY
CMC Triggers Enhanced AR Bolt Carrier GroupCMCBUY
Next Level Armament DLC Bolt Carrier GroupNext Level ArmamentBUY
Guntec Usa Guntec Bolt Carrier Group Ar10 .308 Mil-spec NitrideGuntec UsaBUY
LANTAC M-SPEC Bolt Carrier GroupLANTACBUY
CMMG, Inc .308 Bolt And Carrier Semi-AutoCMMG, IncBUY
Alpha Shooting Sports Premium Nitride 308 Bolt Carrier GroupAlpha Shooting SportsBUY
Black Rain Ordnance Bolt And Carrier Group Nickel Boron .308Black Rain OrdnanceBUY
Wilson Combat TRBCANB308 Bolt Carrier Assembly 308Wilson CombatBUY
Sharps Rifle Co. XPB 308 Balanced Bolt Carrier Group CompleteSharps Rifle Co.BUY
Aero Precision M5 20in .308 Complete Upper ReceiverAero PrecisionBUY

#1 Aero Precision .308 Black Nitride BCG

Aero Precision .308 Black Nitride BCG

The first model is a .308/7.72 Bolt Carrier Group that will make customers happy with a reasonable price and solid materials. The BCG is made of 8620 steel with a nitride coat, which makes the construction durable and minimizes the use of lubricants, thanks to the low friction rate. The materials used for other parts, such as a gas key, firing pin, or bolt extractor are 4130, 8740, and 4340 steel correspondingly. The bolt is tested and inspected, and it’s compatible with all .308 based cartridges.

What I liked:
  • Price
  • Durability
  • Nitride finish
  • Compatibility
What I didn’t like:
  • None

#2 JP Enterprises Complete JPBC Bolt Carrier Group

JP Enterprises Complete JPBC Bolt Carrier Group

One of the nice models designed by JP Enterprises is made specifically for AR-10. The components are made of stainless steel, which guarantees you a long service life. When used with JPSCS-9MM, the firing impulse is fast, thanks to the reduced stroke length. The bolt bounce is also reduced, which increases accuracy and reliability. A tighter firing pin channel also reduces pin wear. The model looks nice and works great, but costs a little more.

What I liked:
  • Price
  • Durability
  • Increased firing rate, accuracy, and reliability
  • Tighter pin channel
What I didn’t like:
  • Compatibility

#3 Spikes Tactical .308 Bolt Carrier Group

Spikes Tactical .308 Bolt Carrier Group

For quite the same price, you can buy this bolt carrier group that is made of 8620 steel with either phosphate or nickel boron finish. The carrier and gas key have beautiful chrome interiors that can last for many years. The bolt itself is made of 9310 steel. This is a good, reliable model without extra features that will make you poor.

What I liked:
  • Price
  • Durability
  • Design
What I didn’t like:
  • Low on features

#4 Ballistic Advantage .308 Bolt Carrier Group

Ballistic Advantage .308 Bolt Carrier Group

Let’s increase the price gradually. Here we’ve got an 8620 alloy steel carrier with a 9310 alloy steel bolt. Plus, an S7 tool steel extractor. The outstanding feature of this BCG is the existence of forward-assist serrations. The BCG ensures a smooth shooting experience, and it serves as a great add-on for your rifle.

What I liked:
  • Durability
  • Forward assist serrations
  • Ergonomic design
What I didn’t like:
  • Low on features

#5 Faxon Firearms .308 9310 Bolt Carrier Complete – Nitride

Faxon Firearms .308 9310 Bolt Carrier Complete - Nitride

One more nice model that ensures long-lasting performance and high shooting efficiency. Thanks to the nitride finished 9310 steel bolt and solid extractor, carrier, and key, fouling, and friction are reduced. The bolt carrier group also features forward assist serrations. This guarantees good precision and proper functioning of your firearm. Besides, the price is rather reasonable, which is always good.

What I liked:
  • Price
  • Durability
  • Reduced fouling and friction
  • Forward assist serrations
What I didn’t like:
  • None

#6 CMC Triggers Enhanced AR Bolt Carrier Group

CMC Triggers Enhanced AR Bolt Carrier Group

This one is especially good for suppressed or short-barreled rifles because it ensures the proper gas pressure, improving extraction. The case-hardened 8620 steel carrier with 3 forward ports and the black nitride finish ensures the smoothest operation. The bolt is also made of 9310 case-hardened steel with a nitride finish, which decreases possible friction. This is a good model for a low price, so you’d better not miss it.

What I liked:
  • Price
  • Nitride finish
  • Durability
  • Proper gas pressure
What I didn’t like:
  • Low on features

#7 Next Level Armament DLC Bolt Carrier Group

Next Level Armament DLC Bolt Carrier Group

What concerns this model, it differs a bit from those we have seen earlier. Thanks to the expanded rear, the cycling in the buffer tube is much better. All internal parts are coated, and the bolt is made of SAE 4140ph high-grade steel, which makes the entire construction durable and strong. It has great resistance to structural failure.

What I liked:
  • Price
  • Durability
  • Expanded rear
What I didn’t like:
  • Low on features

#8 Guntec Usa Guntec Bolt Carrier Group Ar10 .308 Mil-spec Nitride

Guntec Usa Guntec Bolt Carrier Group Ar10 .308 Mil-spec Nitride

Just another good example of a bolt carrier group. A standard 9310 hardened steel bolt with an 8620 carrier and properly staked gas key will improve your AR-10 with a breeze. The nitride coat plays a big role in ensuring a smooth shooting experience. This brand is very reputable on the market, so you will not get disappointed.

What I liked:
  • Price
  • Nitride coat
  • Durability
What I didn’t like:
  • Low on features

#9 LANTAC M-SPEC Bolt Carrier Group

LANTAC M-SPEC Bolt Carrier Group

This is, perhaps, one of the cheapest models. However, it still offers decent characteristics, which is hard to find nowadays. This is an 8620-steel heat treated and hard ground carrier that suits MILSPEC. The materials for the bolt are a bit less solid but still very reliable, and it’s Carpenter 158. The bolt is also hard ground and it’s shot-peened. Altogether with the nitride finish, the BCG works perfectly.

What I liked:
  • Price
  • Nitride finish
  • Compatibility
What I didn’t like:
  • Durability

#10 CMMG, Inc .308 Bolt And Carrier Semi-Auto

CMMG, Inc .308 Bolt And Carrier Semi-Auto

Although this model is worth buying, it has some peculiarities that are needed to be mentioned. First of all, this a semi-auto bolt carrier group, which means it suits only CMMG Mk3. The phosphate finish makes it more durable and efficient. We would say that it’s a good choice if you have nothing else.

What I liked:
  • Durability
  • Phosphate finish
What I didn’t like:
  • Price
  • Compatibility

#11 Alpha Shooting Sports Premium Nitride 308 Bolt Carrier Group

Alpha Shooting Sports Premium Nitride 308 Bolt Carrier Group

If you are looking for a cheap but yet well-designed solution, this BCG is a must-have for you. Nothing is outstanding, it’s just a good model for a low price. A solid 9310 steel bolt and an 8620-steel carrier are coated with premium nitride, which reduces pollution and friction. In addition to this, the construction has forward assist serrations, which is also a great advantage that ensures proper functioning.

What I liked:
  • Price
  • Durability
  • Forward assist serrations
  • Nitride premium finish
What I didn’t like:
  • None

#12 Black Rain Ordnance Bolt And Carrier Group Nickel Boron .308

Black Rain Ordnance Bolt And Carrier Group Nickel Boron .308

What is curious regarding this model, is that you won’t find a lot of information about it. But it’s one of the priciest models. The reason is that it uses solid materials and a nickel-boron finish, which is not cheap. Different reviews would say it’s a good model that is a little overpriced.

What I liked:
  • Durability
  • Design
  • Nickel-Boron finish
What I didn’t like:
  • Price

#13 Wilson Combat TRBCANB308 Bolt Carrier Assembly 308

Wilson Combat TRBCANB308 Bolt Carrier Assembly 308

Another rather expensive model that requires no presentation. It’s a steel bolt carrier assembly that has a nickel-boron finish just like the previous competitor. With the help of this little add-on, you will make your AR rifle stronger. Get ready to spend some money if you want a good custom weapon.

What I liked:
  • Durability
  • Design
  • Nickel-Boron finish
What I didn’t like:
  • Price

#14 Sharps Rifle Co. XPB 308 Balanced Bolt Carrier Group Complete

Sharps Rifle Co. XPB 308 Balanced Bolt Carrier Group Complete

With a case-hardened 8620 alloy steel carrier and a robust 9310 nickel-chrome-moly alloy steel bolt covered with matte diamond-like carbon, the last model guarantees the best shooting experience for any AR-10 or AR-15 rifle. The gas key is properly staked, the cam pin and extractor are Manganese Phosphate coated, and so on. This is a good buy that costs a rather big sum.

What I liked:
  • Durability
  • DLC coat
  • Compatibility
  • Manganese Phosphate coat
What I didn’t like:
  • Price

#BONUS: Aero Precision M5 20in .308 Complete Upper Receiver

Aero Precision M5 20in .308 Complete Upper Receiver

If you are looking for a BCG, you should also at the upper receiver block that comes with all necessary elements but still offers good customization optionality. This model is a good solution for .308 caliber. It’s forged from 7075 T6 aluminum, which makes it durable and reliable. However, you have to choose the upper receiver first.

What I liked:
  • Durability
  • Price
What I didn’t like:
  • none

FAQ

Does bolt carrier group for 308 affect accuracy?
Not at all. The upper receiver is responsible for the accuracy, but the bolt carrier group doesn’t affect it too much.
How long do bolt carrier groups last?.
They actually don’t wear out, but we recommend you watch your gas key be staked properly.
Are bolt carrier groups interchangeable?
Yes, the majority of groups are interchangeable.
Is a full auto bolt carrier legal?
Absolutely.

Conclusion

It’s hard to say that there is the best model among those 14 models on the list. It’s even hard to divide them into cheap and expensive. But we want to point out the next models that we consider to be the best:

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