Upgrade your AR-15 build with the Lantac MSPEC BCG , a mil-spec bolt carrier group engineered for performance, durability, and reliable operation under the toughest conditions. Crafted to military specifications and enhanced with premium components, it delivers top-tier functionality without breaking the bank. Key Features: 8620 steel full-auto carrier : heat-treated, hard-turned, and ground for exact mil-spec tolerances Carpenter 158 or 9310 bolt : shot-peened and hard-turned to ensure superior durability Quantum Peak Quench (QPQ) nitride finish : increases corrosion resistance and reduces friction Lantac CPR360 domed cam pin : CNC-machined 174PH stainless hardened to H900 for smoother cycling Magnetic Particle Inspected (MPI) : verified crack-free for safety and reliability Full-auto (M16) profile : adds weight for improved bolt carrier momentum Lifetime warranty and Made in the USA Why Choose Lantac M-SPEC? Delivers mil-spec precision with no hidden compromises Additional enhancements -nitride finish, domed cam pin-for increased performance Offers value : elevated durability at a mid-range price Ideal for shooters who demand reliability and longevity in high-round-count applications.