The WLA M16 Bolt Carrier Group features a billet extractor and premium polished nickel boron finish designed for reliable performance in 5.56 caliber AR-15 platforms.WLA M16 Bolt Carrier Group (BCG)5.56 caliber compatibilityBillet extractor for enhanced reliabilityPolished nickel boron coating for durability and easy cleaningMade in USA quality constructionAR-15 accessory compatibleEngineered for superior performance and longevity this BCG offers enhanced extraction reliability and corrosion resistance making it ideal for both recreational and professional applications.