Lantac M-SPEC BCG .223/5.56mm NiB

Designed for users seeking dependable performance over extended use, the Lantac M-SPEC BCG .223/5.56mm NiB offers a balance of military specification standards and enhanced durability features. Its construction and finish are selected to support consistent operation and reduced maintenance needs, making it suitable for long-term reliability in AR15 platforms.

This bolt carrier group is manufactured from 8620 steel and features a full auto profile for increased mass. The Nickel Boron (NiB) coating provides superior corrosion resistance and lubricity compared to standard phosphate finishes, supporting smoother cycling and easier cleaning over time.

Features

• Precision machined to milspec dimensions and tolerances
• Full auto style carrier with increased mass
• Nickel Boron (NiB) coated for enhanced corrosion resistance and lubricity
• Bolt machined from Carpenter 158 or 9310 steel, shot peened and hard turned
• Includes Lantac CP-R360 domed head cam pin, machined from 17-4PH stainless steel and hardened to H900 condition
• Designed for .223/5.56mm AR15 platforms

Specifications

• Brand: Lantac USA LLC
• Model: M-SPEC BCG .223/5.56mm NiB
• MPN: 01-MSPEC-556-NIB-BCG
• UPC: 614347506295
• Material (Carrier): 8620 steel, case hardened
• Material (Bolt): Carpenter 158 or 9310 steel
• Finish: Nickel Boron (NiB)
• Cam Pin: 17-4PH stainless steel, H900 hardened
• Caliber Compatibility: .223/5.56mm
• Color: Silver
• Condition: New