High Polish Nickel Boron Bolt Carrier Group (5.56mm / .300 BLK)
Made to our exacting quality standards and magnetic particle inspected, our M16-profile nickel boron bolt carrier group is here to offer substantially enhanced reliability, easier cleaning, and better lubricity (including a lower overall need for lubrication) compared to a standard mil-spec manganese phosphate bolt carrier group. 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.
- 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: 9310 Steel
- Carrier: 8620 Tool Steel
- Coating: Nickel Boron
- 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
- 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.
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DetailsCurrent Stock:SKU: NI-B-556