The Lantac M-SPEC TiN 5.56/.223 Bolt Carrier Group from Lantac is precision machined to milspec dimensions with an 8620 steel carrier that is heat treated, hard turned and ground to exact tolerances, then QPQ nitrided for enhanced corrosion resistance, durability, and performance. The full auto style carrier features increased mass for smoother cycling, while the bolt is crafted from Carpenter 158 or 9310, shot peened and hard turned to military specifications for reliability under demanding conditions. Each BCG is further equipped with a CP-R360 domed cam pin made from 17-4PH stainless steel, hand polished and hardened to H900 to reduce friction and wear within the upper receiver, ensuring long-term smooth operation. The TiN Titanium Nitride DLC coating on the bolt carrier adds a durable, low-friction finish ideal for high-volume shooters, and the combination of these components delivers enhanced longevity and dependable performance. Designed with budget-minded builders in mind, the M-SPEC line combines quality and reliability with practical features, making it a solid choice for rifle enthusiasts seeking a durable, America-made bolt carrier group that stands up to rigorous use.