LanTac USA LLC 556 MilSpec+ BCG Black Nitride

The LanTac 556 MilSpec+ BCG is a drop-in replacement bolt carrier group for AR-15 and M16 pattern rifles chambered in 5.56 NATO/.223 Remington. Built to exceed military specifications, this BCG delivers reliable cycling with improved corrosion and wear resistance over standard phosphate-coated carriers. Shooters upgrade to this carrier group for enhanced durability in high-volume shooting and harsh environmental conditions.

Machined from 8620 steel with a 9310 steel bolt, the entire assembly features a black nitride finish that penetrates the metal surface rather than coating it, providing superior hardness and lubricity. This finish reduces fouling buildup and simplifies cleaning. Installation is straightforward—this is a complete, drop-in BCG requiring no fitting or gunsmithing. Gas key is properly staked to MIL-SPEC standards.

• Part Type: Bolt Carrier Group
• Compatible Firearms: AR-15, M16 (5.56 NATO/.223 Remington)
• Material: 8620 Steel Carrier, 9310 Steel Bolt
• Finish: Black Nitride
• Installation: Drop-In
• Includes: Complete Bolt Carrier Group (carrier, bolt, cam pin, firing pin, retaining pin)