Luth-AR LR-308 Phosphate Bolt Carrier Group

SKU: 308-BCA

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Durable & Reliable BCG Upgrade For AR-308 Rifles

This Luth-AR LR-308 Bolt Carrier Group is a high-quality and reliable option for AR-308 builds perfect for upgrading or replacing worn or broken BCG parts. It is designed strictly to military specifications to ensure proper fitment and function on DPMS styled 308 rifles and provides a smooth and reliable setup with maximum durability.

The BCG comes assembled with the .308 Bolt/ extractor already installed and will work perfectly with mil-spec LR308/SR25 upper receivers.

Manganese Phosphate Finish

The Carrier on this BCG is made of 8620 steel while the extractor is made from 4140 Chrome Moly for maximum durability. Coated in Manganese Phosphate finish, this BCG ensures a smooth operation of the upper receiver while also making it easy to clean and maintain.

This Luth-AR LR-308 Assembled BCG includes firing pin, retaining pin, cam pin, bolt w/ extractor installed, and bolt carrier key screws(2).


  • Bolt Carrier
  • .308 Bolt w/extractor installed
  • Carrier Key
  • Firing Pin
  • Cam Pin
  • Firing Pin Retaining Pin
  • Bolt carrier key screws (2)

Bolt Carrier Specs:

  • Carrier: 8620 steel
  • Cam pin: 4340 Alloy steel
  • Carrier key: 4130 Alloy steel
  • Army Spec Heat Treatment
  • Manganese Phosphate


  • Due to supply chain issues, material for the bolt may vary.
  • Mil-Spec heat treat
  • Manganese Phosphate


  • 4140 Chrome Moly
  • Machined from bar-stock
  • Mil-Spec heat treat
  • Manganese Phosphate

Have Questions About this Product?

The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.

If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.

Luth-AR Limited Warranty

  • Luth-AR, LLC manufactured products are warranted for 1 (one) year from the date of purchase against manufacturing defects in material and/or workmanship. All parts and labor or replacement, at our option, are covered.
  • Government fees, damage caused by failure to perform normal maintenance, sales outside the United States, damage due to high velocity, high pressure, reloaded, or other non-standard ammunition, or any unauthorized repair, modification, misuse, abuse, or alteration of the product is not covered by this limited warranty.
  • Consumable items such as gas rings, O’ rings, etc., are not warranted.
  • Luth-AR, LLC complete assembled uppers will be warranted for a period of 1 (one) year after the complete upper was purchased.
  • The warranty applies towards defects in materials or workmanship of the complete upper. Luth-AR will pay for all warranty repairs, at no charge to the consumer. Please supply a copy of the invoice for proof of purchase.
  • The use of re-load ammunition, proof rounds, or factory ammunition that exceeds initial SAAMI specifications voids any warranty. Any repairs or modifications not done by Luth-AR also voids any warranty.
  • Complete uppers not assembled or built by Luth-AR are not covered by the 1 (one) year warranty.
  • Please call our warranty department at (763) 263-0166 or email for any warranty issues.

Disclaimer: Manufacturer’s warranty is subject to change without prior notice.