NLX556 5.56 NATO Bolt Carrier Group for AR-15, DLC Coated, Black

The NLX556 Bolt Carrier Group is a 5.56 NATO-chambered BCG from Next Level Armament (brand part no. NLX556-BCG-DLC), finished in a black DLC (diamond-like carbon) coating. DLC coatings are valued on bolt carrier groups for their low-friction, corrosion-resistant surface, which helps reduce carbon buildup and ease cleaning compared to an uncoated or phosphate-finished carrier. It’s built as a complete BCG swap for AR-15 uppers chambered in 5.56 NATO.

Key Specifications

• Built for 5.56 NATO chambered AR-15 uppers, also compatible with .223 Remington ammunition.
• Finished with a black DLC coating for a low-friction, corrosion-resistant surface.
• Sold as a complete bolt carrier group for AR-15 upper assemblies.

Frequently Asked Questions

What caliber is this BCG built for? 5.56 NATO, which also runs .223 Remington ammunition in AR-15 uppers.

What is the DLC coating for? It’s a diamond-like carbon finish that provides a low-friction, corrosion-resistant surface, easing cleaning and reducing carbon buildup versus an uncoated carrier.

Buy the NLX556 Bolt Carrier Group

Upgrade your AR-15 upper with the DLC-coated NLX556 Bolt Carrier Group from Next Level Armament. It ships fast from our Lubbock, Texas gun shop, and our rifle parts selection has more rifle parts for your build.