Lantac M-SPEC 5.56/.223 BCG – QPQ Black Nitride

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.