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Best AR 10 Bolt Carrier Group

AR-10 BCG is the part of the rifle that performs the cycling action and helps load a new round into the chamber. The BCG also houses the firing pin and is responsible for striking the primer to ignite the propellant in a cartridge.The Bolt Carrier Group is a core of the firearm, it shouldn’t be underestimated.

Why do we need an AR-10 BCG?

The AR-10 BCG is necessary because it is specifically designed to work with the AR-10 platform. It is made of higher quality steel than other BCGs and is precision machined to ensure that it fits properly and functions flawlessly.The Bolt Carrier Group allows you to improve the durability, precision, and reliability of your AR build, eliminating cycling issues.

The Best Pick

J P ENTERPRISES AR LOW MASS BOLT CARRIER GROUP

J P ENTERPRISES AR LOW MASS BOLT CARRIER GROUP

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This reduced-weight bolt/ carrier assembly helps tame felt recoil on a DPMS, JP, or Remington AR-style .308 rifle (LR-308 pattern only). Designed to bear high-heat, high-impact use.

Top 18  AR 10 Bolt Carrier Group

#1 ODIN Works AR10 Black Nitride Bolt Carrier Group

ODIN Works AR10 Black Nitride Bolt Carrier Group

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Specification

Color: Black
Finish: Nitride
Fabric/Material: Steel
Caliber: Universal
Gun Model: AR-15

The AR10 bolt carrier group is constructed for multi-caliber: .308, 6.5 CM, 6 CM, and any other caliber with that size of the case head. The High-Pressure Bolt is manufactured from case hardened 9310 Steel Carrier is from 8620 Steel with Black nitride finish (QPQ), properly staked gas key is from 4130, hardened 4340 cam pin, the extractor is from 4340 steel.

Pros
  • The smaller diameter firing pin and pin hole helps with high-pressure cartridges

  • MPI and HPT tested

  • Manufactured in specialized factories

  • Compatible with DPMS style and other AR10 rifles

  • Cycles smoothly

  • Reliable in 6.5 Creedmoor rifle: with 5,56 and 300 AAC Blackout runs great

  • Looks cool

  • Fairly affordable

Cons
  • California’s Proposition 65

  • The bolt head leaves brass shavings all over inside the chamber and on the bolt head

  • Sharp Extractor

#2 Stag Arms Stag 10 QPQ Bolt Carrier Group

Stag Arms Stag 10 QPQ Bolt Carrier Group

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Specification

Cartridge: .308 Winchester, 6.5mm Creedmoor
Gun Model: AR-10
Hand: Right
Caliber: .308 Caliber
Gun Type: Rifle

The QPQ (Quench polish quench) Nitride BCG functions with any rifle, upper half, or barrel, bored for .308/6.5 Creedmoor. The AR-10 Bolt Carrier Group is constructed from 8620 steel with a Black Nitride finish and right-hand ejection. The BCG consists of a Bolt carrier with a shrouded firing pin, cam pin, bolt assembly, and firing pin retaining pin.

Pros
  • Fits DPMS and Stag Upper Receivers and Barrels

  • Right-Handed Bolt assembly

  • The nitrocarburizing case hardening enhances corrosion resistance

  • Proper mil-spec staking of the gas key

Cons
  • Not Yet Rated

#3 TRYBE Defense Milspec Complete Bolt Carrier Group

TRYBE Defense Milspec Complete Bolt Carrier Group

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Specification

Fabric/Material: 8620 Steel
Caliber: .308 Winchester
Gun Model: AR-10
Included Accessories: No Forward Assist

The fully-assembled DPMS-compatible BCG comes with the AISI Steel Nitride-Treated Bolt Carrier (8620) and Bolt Shot Peened (9310), firing pin, cam pin, enhanced Ejector, Firing Pin Retaining Pin, Gas Key Properly Staked, and Extractor Pin. The BCG is paired with .308-chambered AR-10s and should be cleaned and oiled regularly.

Pros
  • Trybe warranty

  • High Pressure Tested (HPT) and Magnetic Particle Inspected (MPI)

  • Machined from ultra-sturdy and corrosion-resistant 8620 steel

  • Dependable performance due to the hardening to mil-spec condition

  • Smooth and reliable cycle

  • Great for 308/7.62×51 building with a small firing pin model or get the JP high-pressure bolt kit (not recommended for a 6.5 Creedmoor build)

  • A nice uniform black semi-gloss finish allows keeping the BCG clean easier than some of the low-cost phosphate finishes

  • Well-staked gas key

  • The forward assist notches engage as they should

  • The gas port is a little too small for the gas tube to slide in: it needs to remove about .0010 of material from the port. After cleaning, polishing, and 20+ rounds later, the BCG is locked and loaded

  • Good internal fit

  • Nitride-Treated Gas Key & Extractor

  • No scratches, scuffs, dings nothing

  • Fit smoothly into the upper

  • After breaking in cycles perfectly

  • No Forward Assist Serrations

Cons
  • The case of defected BCG: fail to fire

  • Jams and bit into the round 20 times: have to pop the upper of the lower and use a pinch to slightly pry the BCG back then it would slide back and pop the round that doesn’t fire out

  • Needs to be broken in

  • Chews up charging handle

  • Not mil-spec

#4 FailZero 308 Bolt Carrier Group

FailZero 308 Bolt Carrier Group

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Specification

Fabric/Material: 9310 Steel
Caliber: .308 Caliber
Gun Model: AR-15
Coating: EXO Nickel Boron

The Assembled BCG promptly and easily fits into the weapon, DPMS Pattern, and 6.5 Creedmoor compatible. All essential BCG components are covered with EXO Nickel-boron to ensure permanent dry lubricity and enhance durability. The Bolt is 9310 Steel, the Carrier is 8620 Steel.

Pros
  • Corrosion – and wear-resistant EXO Nickel-boron coating minimizes friction, improving overall firearm performance

  • Ready-to-install drop-in BCG

  • Magnetic Particle Inspected

  • Live Fire Tested

  • Perfect Fit

  • Easy clean-up

  • Perfect head spacing

Cons
  • Jamming-up issues: the extractor spring doesn’t hold up to the round it is supposedly designed for

  • Not 6.5 Creedmoor compatible: the 6.5 is such a high-pressure round, that standard 308 BCGs are unable to contain the pressure and the firing pins are too long

#5 ArmaLite AR10 Bolt Carrier Assembly

ArmaLite AR10 Bolt Carrier Assembly

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Specification

Gun Model: AR-10
Torque: 55-inch lbs.

The Complete bolt assembly is manufactured from Steel Bolt and Steel (8620) Carrier with Black Chrome finish. The AR-10 BCG features 55-inch lbs torque on the gas key screws.

Pros
  • Sturdy material

  • Durable coating

Cons
  • Not Yet Rated

#6 New Frontier Armory New Frontier Bolt Carrier

New Frontier Armory New Frontier Bolt Carrier

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Specification

Color: Black Matte
Fabric/Material: Steel
Dimensions: 1.20 X 4.00 X 9.45 in
Height: 1.2 in

The AR 10 Bolt Carrier is constructed for flawless operation with rifles, using .308 and 7.62×51 calibers. The BCG is machined from Steel, and covered with Black Matte.

Pros
  • Heavy-duty and long-lasting

  • Compatible with .308 and 7.62×51 calibers

  • Quality Black Matte finish

Cons
  • Not Yet Rated

#7 Guntec Usa Guntec Bolt Carrier Group

Guntec Usa Guntec Bolt Carrier Group

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Specification

Finish: Nitride
Fabric/Material: Steel
Caliber: .308 Caliber
Gun Model: AR-10

The AR10 BCG consists of 9310 Hardened Steel Bolt, 8620 Steel Carrier and gas key, 17-4 Stainless Steel Firing Pin (Heat treated to H900 Condition), and S7 tool steel hardened extractor.

Pros
  • Economic value

  • HPT/MPI Tested and Marked

  • Designed for 7.62X51 / 308 Caliber

  • Mil-spec Black Nitride coating

  • Fully assembled with duly torqued and staked gas key

Cons
  • Not Yet Rated

#8 2A Armament AR10 Full Mass Bolt Carrier Group

2A Armament AR10 Full Mass Bolt Carrier Group

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Specification

Color: Black
Coating: Nitride
Fabric/Material: 8620 steel, heat treated
Gun Model: DPMS LR-308
Diameter: 0.308 in

The AR10 Full Mass Carrier (FMC) is engineered for LR-.308 DPMS-style rifles. The 2A Armament BCG comes with Carrier from heat-treated 8620 steel; Bolt from MP heat-treated 9310 steel; machined, heat-treated Extractor, and Carrier key. These BCGs are compatible with full-auto firearm systems, but they don’t support the use of forward assist.

Pros
  • Made in the USA

  • All surfaces are Black Nitrided

  • Staked screws

Cons
  • Not Yet Rated

#9 Dark Storm Industries Bolt Carrier Groups

Dark Storm Industries Bolt Carrier Groups

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Specification

Cartridge: .308 Winchester
Caliber: .308 Caliber

The DS-10 Bolt Carrier Groups are paired with most SR, LR, DPMS, CMMG, and DSI .308 in AR-10 Rifles. The Phosphate Chrome BCG includes 9310 Heat Treated Bolt, S7 Tool Steel Hardened Extractor, 17-4 Heated Treated Stainless-Steel Firing Pin, 8620 Carrier, and Gas Key.

Pros
  • Grade 8 Torqued and Staked Gas Key Hardware

  • MPI Inspected Bolt

  • Durable Nickel Boron Coating

Cons
  • Not Yet Rated

#10 JP Enterprises VMOS AR Bolt Carrier

JP Enterprises VMOS AR Bolt Carrier

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Specification

Weight: 16 oz
Caliber: .308 Winchester, 7.62×51 NATO, or other cartridges requiring the longer magazine format

Some degree of mass regulation is needed for optimal performance with suppressed rifles and exotic caliber chamberings without adjustable gas blocks. The Variable Mass Operating System (VMOS) carrier delivers dependability through additional reciprocating mass but provides more custom tunability. This BCG fits only the DPMS family of AR-10s, and won’t cycle with a standard buffer retainer plunger installed.

Pros
  • Large-Frame (.308)

  • Heavy Version

  • The Silent Captured Spring in combination with multiple masses (one steel and two tungsten weights) are exchangeable to flawlessly tune the operating system weight

  • Sturdy QPQ coatings ensure significant natural lubricity

  • Enhanced bearing surfaces for slower wear and longer part life

  • Guaranteed reliability of difficult configurations

  • Overcomes all fouling build-up

  • The recoil is easy to anticipate and control

  • Roller-burnished bore for frictionless operation

  • Smooth cycling with due lubrication

  • Longer cooking pad for optimal dependability

Cons
  • California’s Proposition 65

  • Not Yet Rated

#11 J P ENTERPRISES BOLT CARRIERS BLACK

J P ENTERPRISES BOLT CARRIERS BLACK

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Specification

Cartridge: 308 Winchester
Finish: Black

#12 J P ENTERPRISES AR LOW MASS BOLT CARRIER GROUP

J P ENTERPRISES AR LOW MASS BOLT CARRIER GROUP

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Specification

Cartridge: 308 Winchester
Finish: Black

This reduced-weight bolt/carrier assembly helps tame felt recoil on a DPMS, JP, or Remington AR-style .308 rifle (LR-308 pattern only). The weight-reducing cuts on this carrier and the original JPBC-3 AR-15 bolt carrier are the same. The BCG includes a complete JP Enhanced Bolt (available separately as well), installed and staked carrier key; it’s constructed for high-heat, high-impact use. Available with QPQ or polished stainless finish.

Pros
  • Made in the USA

  • Allows mitigating Felt Recoil on Large-Caliber AR Platform Rifles

  • Enhanced bolt alignment and better wear resistance due to the wide carrier rails with extra bearing surfaces

  • The Bolt finish feels like it is lubed up

  • Ejects smoothly and efficiently

  • Machining and fitment are outstanding

  • Great for shooting competition or heavy use

Cons
  • Not yet

#13 CMC TRIGGERS ENHANCED BOLT CARRIER GROUP

CMC TRIGGERS ENHANCED BOLT CARRIER GROUP

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Specification

Cartridge: 30 Caliber (.308)
Finish: Black

The AR 308 Enhanced BCG allows improving performance in the short-action ARs with 7.62 NATO cartridges and related rounds. The carrier is designed with relocated bearing surfaces, delivering smoother, more reliable operation. The bolt assembly from case-hardened 8620 steel features Mil-spec dimensions and external surfaces that are CNC-ground after heat-treatment to provide precise tolerances.

Pros
  • Made in the USA

  • A flared rear assembly prevents the carrier from canting or tilting during recoil

  • Outstanding fit

  • Optimized for use with suppressors

  • Gas escapes in the event of an overpressure round due to the three forward ports

  • Low-friction, black-nitride coating

Cons
  • Not yet

#14 CMMG – 308 AR BOLT CARRIER GROUP

CMMG - 308 AR BOLT CARRIER GROUP

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Specification

Cartridge: 308 Winchester
Finish: Matte Black

The complete bolt/carrier group is designed for AR-style .308 rifles. The carrier is without forward assist serrations and features a sturdy phosphate finish and chrome-lined interior. The BCG includes an extractor, gas key (torqued to spec and properly staked), firing pin, cam pin, and firing pin retaining pin.

Pros
  • Made in the USA

  • Heavy-Duty Construction

  • Locks up tight with no rattles anywhere

  • Feeds and ejects flawlessly

  • The first-rate materials (8620 steel, 9310 hardened steel, hardened S7 tool steel)

Cons
  • Not yet

#15 BROWNELLS – 308 AR TITANIUM BOLT CARRIER GROUP DLC

BROWNELLS - 308 AR TITANIUM BOLT CARRIER GROUP DLC

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Specification

Cartridge: 308 Winchester
Finish: DLC

A Big-Bore AR BCG for a DPMS/SR25 pattern saves weight off a rifle design that can get hefty quickly. This Bolt Carrier Group is crafted using 6A1-4V titanium for the carrier, and 9310 tool steel for the bolt.

Pros
  • Built Light and Rugged

  • Cuts down on weight in any AR-Style .308 rifle

  • Undergoes magnetic-particle inspection

  • Allows to reduce the felt recoil

  • Durable Diamond-Like Carbon (DLC) coating

  • Fully-assembled part with a properly torqued and staked gas key, as well as a correctly installed O-ring on the extractor

  • Adjustable gas

  • Lightweight buffer and flat wire spring

  • Shots magnificent

  • Almost no recoil and minimal muzzle jump

  • Headspaces on 18-in Faxon .308 barrel

Cons
  • The extractor is broken immediately: after replacing it with JP extractor and the BCG functions well

#16 AERO PRECISION – AR 308 BOLT CARRIER GROUP

AERO PRECISION - AR 308 BOLT CARRIER GROUP

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Specification

Cartridge: 30 Caliber (.308)
Finish: Phosphate

The BCG is designed for big-bore rifle build (.308, 7.62×51, 6.5 Creedmoor, .338). The Billet carrier with Forward Assist serrations is manufactured from steel (8620) and case hardened. The extractor (4340 steel) comes with double o-rings and springs. The BCG features a laser engraved Aero Precision “A” logo.

Pros
  • Made in the USA

  • Mil-Spec Phosphate coating

  • Properly staked gas key, chrome lined as well as firing pin channel

  • High-pressure, shot-peened, and HPT/MPI Bolt (9310 steel)

  • The AR 308 and AR 10 style builds concerning headspace seem premium: reliable fit and function of this bolt in an Aero M5 enhanced upper with a criterion barrel

Cons
  • No matter how much cleaning/oiling, the bolt gets stuck in the carrier: it is excessively tight when it should move smoothly and without much effort

  • Consistent light strikes/FTF, as the firing pin is more than 1/32in too short

#17 WILSON COMBAT BOLT CARRIER ASSEMBLY

WILSON COMBAT BOLT CARRIER ASSEMBLY

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Specification

Cartridge: 308 Winchester
Finish: Nickel-Boron

The .308 AR Bolt Carrier Assembly is engineered for DPMS-pattern guns, as these are the same BCGs used by Wilson Combat in its finished rifles. The BCG functions on guns chambered in .308 Win, 6.5 Creedmoor, 7.62 NATO, .260 Rem. or any other .308-based cartridge. The bolt is machined from Carpenter 158 steel, which is complete with an extractor and hardened ejector, which is from S7 tool steel, and a bolt carrier – from hardened 8620 steel.

Pros
  • Made in the USA

  • The smoothly-finished bolt carrier is designed without any forward-assist serrations

  • The nickel-boron treatment decreases surface friction and adds sturdiness

  • A properly staked gas key allows drop-in fit into any DPMS-pattern AR .308 rifle without a forward assist

Cons
  • Not yet

#18 ODIN WORKS INC. – AR 308 BOLT CARRIER GROUP

ODIN WORKS INC. - AR 308 BOLT CARRIER GROUP

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Specification

Cartridge: 308 Winchester
Finish: Black Nitride

This BCG, coming with a firing pin and everything necessary, will work in DPMS AR-10 in .243 caliber and in an Aero M5 AR-10 Upper in 6.5 CM, in all AR 308 rifles, including the DPMS pattern.

Pros
  • Treated with a low-friction

  • Durable Black-nitride finish

  • Designed for popular Short-Action Cartridges (.308 Win., the 6.5 Creedmoor)

  • The use of a smaller-diameter firing pin and firing-pin hole aids in the performance of these higher-pressure cartridges

Cons
  • Not yet

How to clean and lubricate AR-10 BCG?

Cleaning and lubricating your AR-10 BCG is a crucial part of maintaining your rifle and keeping it in good working order. Here are some tips on how to do it properly:

  1. First, you will need to disassemble your AR-10 BCG by removing the charging handle and bolt carrier group.
  2. Next, you will need to clean the inside of the bolt carrier group with a brush and solvents. Besure to remove all carbon build up and residue.
  3. Once the inside of the bolt carrier group is clean, you will need to lubricate it with a quality gun oil or lubricant. Apply a thin layer of lubricant to all moving parts, including the bolt, carrier, and charging handle.
  4. Finally, reassemble your AR-10 BCG and test it to make sure everything is working properly.

By following these simple steps, you can keep your AR-10 BCG in good condition and extend its lifespan. Regular cleaning and lubrication will also ensure that your rifle is always ready to fire when you need it.

Conclusion

AR-10 BCGs are a critical component of the AR-10 rifle. Bolt Carrier Groups ensure due cycling during every trigger pull of the firearm. The BRG can be included in upper receivers, or come separately with or without a charging handle. Before buying the BCG check the completeness properly.

They also must be properly cleaned and lubricated to ensure the proper functionality of the weapon. In this article, we have provided reviews of some of the best AR-10 BCGs on the market, as well as a FAQ section and a How-To guide for cleaning and lubricating your AR-10 BCG. We hope that you find this information helpful.

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