Description
The Lantac M-SPEC 5.56/.223 Bolt Carrier Group is a mil-spec compatible BCG finished in QPQ black nitride for enhanced corrosion resistance and durability. The carrier is full-auto style with increased mass and is machined from 8620 steel, case hardened and hard turned to mil-spec dimensions. The bolt is MPI machined from Carpenter 158 or 9310, shot peened and hard turned to military specification. Each BCG ships fitted with a Lantac CP-R360 domed cam pin made from 17-4PH stainless steel that is hand polished and hardened to H900 condition.
Key Specifications
The caliber is 5.56/.223.
The carrier is machined from 8620 steel, case hardened.
The bolt is MPI machined from Carpenter 158 or 9310.
The finish is QPQ Nitride in black.
The included cam pin is a CP-R360 domed 17-4PH stainless steel unit.
The BCG is a full-auto style carrier with increased mass.
Shot peening is performed with S110 shot to Almen Gage A-2 .006-.008.
The listed overall length is 10.95 inches.
This part is specified to fit AR-15 platforms.
The product comes with a Lifetime Warranty and is Made in the USA.
Built to deliver reliable, mil-spec-compatible operation without premium pricing, this Lantac M-SPEC BCG brings practical durability to maintenance, upgrades, and budget-oriented builds. Its QPQ nitride finish and hardened components reduce wear and improve service life, making it a solid choice for users who prioritize consistent, long-term performance in an AR-15 platform.
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