LanTac 556 Enhanced BCG Black Nitride – AR-15 Bolt Carrier Group

The LanTac 556 Enhanced BCG is a mil-spec bolt carrier group designed for AR-15 and M16 pattern rifles chambered in 5.56 NATO/.223 Remington. This enhanced carrier features precision machining and quality control standards intended to improve reliability and service life over standard-issue components. The design maintains full-auto profile compatibility while offering refinements in gas key staking, extractor spring tension, and carrier geometry.

Finished in black nitride (also known as melonite or QPQ), the carrier and bolt receive a case-hardened surface treatment that penetrates the metal rather than coating it. This process reduces friction, improves corrosion resistance, and simplifies cleaning compared to phosphate finishes. The bolt carrier group is a drop-in replacement for mil-spec AR-15/M16 upper receivers and requires no fitting or gunsmithing for installation in standard platforms.

• Part Type: Complete Bolt Carrier Group
• Compatible Firearms: AR-15, M16 (5.56 NATO/.223 Remington)
• Material: Carpenter 158 bolt steel, 8620 carrier steel
• Finish: Black Nitride
• Installation: Drop-In
• Includes: Bolt, carrier, cam pin, firing pin, extractor assembly, gas rings