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Brownells
The Brownells AR-308 .308 Caliber Bolt Carrier Group in Nickel Boron finish is a complete, ready-to-run BCG built for DPMS LR-308 pattern rifles. Whether you're running a .308 Winchester, 6.5mm Creedmoor, .243, 7mm-08, .338 Federal, .260 Remington, or other .308-based cartridge, this carrier group delivers the reliability and precision you need for accurate shooting and consistent function. The Nickel Boron coating offers a distinct advantage: it's harder than traditional finishes and self-lubricating, which means less fouling buildup and smoother operation across thousands of rounds.
Built to Brownells' own uncompromising manufacturing standards, the bolt is machined from robust 9310 steel, heat-treated and shot-peened to achieve superior hardness. The carrier itself is forged from hardened 8620 steel. Both components undergo magnetic particle inspection (MPI) to catch any microscopic flaws before they can cause premature failure downrange. The carrier features forward assist notches for reliable bolt closure, and the gas key is torqued and staked to prevent rotation. The extractor comes factory-installed with a rubber insert and spring for consistent case ejection.
This is a complete BCG—firing pin, firing pin retaining pin, cam pin, gas rings, gas key, extractor, and ejector all arrive installed and ready to drop into your upper receiver. No additional parts needed. The dull matte silver Nickel Boron finish resists wear and corrosion, and its self-lubricating properties reduce maintenance headaches on the range or in the field.
| Caliber Compatibility | .308 Winchester and .308-based cartridges (.243, 7mm-08, .338 Federal, .260 Remington, 6.5mm Creedmoor, and others) |
| Platform | DPMS LR-308 pattern rifles |
| Finish | Nickel Boron (dull matte silver) |
| Bolt Material | 9310 steel, heat-treated and shot-peened |
| Carrier Material | Hardened 8620 steel |
| Included Components | Bolt carrier group, firing pin, firing pin retaining pin, cam pin, gas rings, gas key, extractor, ejector—all installed |
This Brownells AR-308 bolt carrier group is designed for DPMS LR-308 pattern upper receivers chambered in .308 Winchester or other .308-based cartridges. It is NOT compatible with Armalite-pattern rifles. Confirm your upper is DPMS LR-308 spec before purchasing.
The Nickel Boron coating is self-lubricating, which reduces fouling buildup and maintenance compared to traditional finishes. Standard rifle cleaning and lubrication practices apply, though the self-lubricating properties mean you'll see less carbon accumulation over extended shooting sessions.
This is a complete BCG. All internal parts arrive factory-installed and ready to use: firing pin, firing pin retaining pin, cam pin, gas rings, gas key, extractor with rubber insert and spring, and ejector. Drop it into your DPMS LR-308 upper and you're ready to shoot.
Brownells manufactures to exacting standards with 9310 steel bolts and hardened 8620 steel carriers, both heat-treated for superior hardness. All components are magnetic particle inspected to eliminate microscopic flaws before assembly. The gas key is torqued and staked for reliability, and you can choose between Black Nitride or Nickel Boron finishes depending on your preference for wear resistance and lubrication properties.
Brownells
The Brownells AR-308 .308 Caliber Bolt Carrier Group in Nickel Boron finish is a complete, ready-to-run BCG built for DPMS LR-308 pattern rifles. Whether you're running a .308 Winchester, 6.5mm Creedmoor, .243, 7mm-08, .338 Federal, .260 Remington, or other .308-based cartridge, this carrier group delivers the reliability and precision you need for accurate shooting and consistent function. The Nickel Boron coating offers a distinct advantage: it's harder than traditional finishes and self-lubricating, which means less fouling buildup and smoother operation across thousands of rounds.
Built to Brownells' own uncompromising manufacturing standards, the bolt is machined from robust 9310 steel, heat-treated and shot-peened to achieve superior hardness. The carrier itself is forged from hardened 8620 steel. Both components undergo magnetic particle inspection (MPI) to catch any microscopic flaws before they can cause premature failure downrange. The carrier features forward assist notches for reliable bolt closure, and the gas key is torqued and staked to prevent rotation. The extractor comes factory-installed with a rubber insert and spring for consistent case ejection.
This is a complete BCG—firing pin, firing pin retaining pin, cam pin, gas rings, gas key, extractor, and ejector all arrive installed and ready to drop into your upper receiver. No additional parts needed. The dull matte silver Nickel Boron finish resists wear and corrosion, and its self-lubricating properties reduce maintenance headaches on the range or in the field.
| Caliber Compatibility | .308 Winchester and .308-based cartridges (.243, 7mm-08, .338 Federal, .260 Remington, 6.5mm Creedmoor, and others) |
| Platform | DPMS LR-308 pattern rifles |
| Finish | Nickel Boron (dull matte silver) |
| Bolt Material | 9310 steel, heat-treated and shot-peened |
| Carrier Material | Hardened 8620 steel |
| Included Components | Bolt carrier group, firing pin, firing pin retaining pin, cam pin, gas rings, gas key, extractor, ejector—all installed |
This Brownells AR-308 bolt carrier group is designed for DPMS LR-308 pattern upper receivers chambered in .308 Winchester or other .308-based cartridges. It is NOT compatible with Armalite-pattern rifles. Confirm your upper is DPMS LR-308 spec before purchasing.
The Nickel Boron coating is self-lubricating, which reduces fouling buildup and maintenance compared to traditional finishes. Standard rifle cleaning and lubrication practices apply, though the self-lubricating properties mean you'll see less carbon accumulation over extended shooting sessions.
This is a complete BCG. All internal parts arrive factory-installed and ready to use: firing pin, firing pin retaining pin, cam pin, gas rings, gas key, extractor with rubber insert and spring, and ejector. Drop it into your DPMS LR-308 upper and you're ready to shoot.
Brownells manufactures to exacting standards with 9310 steel bolts and hardened 8620 steel carriers, both heat-treated for superior hardness. All components are magnetic particle inspected to eliminate microscopic flaws before assembly. The gas key is torqued and staked for reliability, and you can choose between Black Nitride or Nickel Boron finishes depending on your preference for wear resistance and lubrication properties.
