Dark Matter™ High-Polish DLC Bolt Carrier Group (5.56mm / .300 BLK)

(3 reviews) Write a Review
$269.99
SKU:
DRKMTTR-BCG-556
Minimum Purchase:
1 unit
Maximum Purchase:
3 units

Out of stock

Product Overview

Dark Matter High-Polish Black DLC Bolt Carrier Group (5.56mm / .300 BLK)

Introducing the Dark Matter bolt carrier group, where form meets function. Cloaked in a mirror-like polished DLC (diamond like carbon) coating, the Dark Matter BCG has a glass-smooth finish made to dramatically reduce friction, offer superior lubricity, and make cleaning especially easy. The bolt itself is MPI (Magnetic Particle Inspected). For added long-term reliability, our gas keys are staked using OCKS screws (Optimized Carrier Key Screw) which feature sharp, deep, effective knurling to ensure superior staking.

Attributes

  • Coating: Highly-Polished DLC
  • Compatibility: M16/ M4 / AR-15 Using Direct Gas Impingement (not for use in piston guns)
  • Calibers: 5.56x45mm NATO / .223 Remington / .300 AAC Blackout
  • Profile: Full Auto Style Carrier w/ Properly Staked Gas Key
  • Bolt: C158
  • Carrier: 8620 Tool Steel
  • Total Weight: 11 5/8 OZ.
  • True Mil-Spec dimensions
  • 4130 steel gas key
  • Staked with OCKS Screws from Michiguns
  • 4140 steel extractor and cam pin
  • Hard chrome ground 8740 steel firing pin
  • Magnetic particle inspected
  • High Pressure Tested (HPT)
  • Made in the USA. Proudly.

EXPORT CONTROLS NOTICE: By adding to cart, you, the customer, understand, acknowledge, and agree to our Export Policy, and, additionally, our Terms & Conditions. Furthermore, you certify that you are a U.S. Person, and that you do not intend to export this product. Products listed on this page and throughout this site are subject to one or more of the U.S. export control laws and regulations enforced by the U.S. Department of State, the U.S. Department of Commerce, or the U.S. Department of the Treasury, which include the International Traffic in Arms (ITAR) regulations as well as Export Administration Regulations (EAR). It is unlawful and strictly prohibited to engage in conduct requiring a license or other approval from the proper U.S. Department without such license or approval. These controls take the form of export regulations and license requirements. As part of the express consideration provided for receipt of Walker Defense Research LLC's goods, technical data, and/or services, you, our customer, acknowledge that the export, re-export, or other transfer, directly or indirectly, of the goods, technical data, and/or services provided by Walker Defense Research (WDR) in violation of U.S. law is prohibited. Customers acquiring ITAR or EAR-regulated goods, technical data, and/or services from WDR shall be responsible for obtaining any necessary U.S. or other government authorization required to ensure compliance with applicable export laws. We will not ship outside of the United States.

Reviews

(3 reviews) Write a Review

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  • 5
    Dark Matter High Polish DLC Bolt Carrier

    Posted by Tony Shanklle on Apr 5th 2026

    I went on a hunt for DLC bolts and bought several from several different companies. WDR's fit and finish would rank at the top of my list. This is a must for any AR... just buy it. Also, The people at WDR are wonderful and communicate well. A great company to do business with.

  • 5
    DLC bcg

    Posted by Kdubbs on Jun 2nd 2025

    First off, I have zero rounds through this bcg. I put it in a retro build that charged very rough with a Microbest chrome bcg. This dlc bcg made it butter smooth. I will update this review after I shoot it (if I can update).

  • 5
    Exceptional!!!

    Posted by Paul on Jan 30th 2025

    The craftsman is unmatched. Runs flawlessly!!!!