Lantac Enhanced 6mm ARC E-BCG Nitride Carrier for 223/556

The Lantac Enhanced 6mm Arc 223/556 Blk Nitride E-BCG is a precision machined 8620 carrier system designed to optimize reliability, heat management, and smooth operation for both semi-auto and full-auto capable rifles. The 6ARC variant features a specialized bolt and firing pin paired with an M16 full auto style design to increase mass and lock time, delivering a stable, consistent impulse. Precision components include a shot peened bolt manufactured from Carpenter 158 or 9310 that is MPI tested, with all critical dimensions hard turned and ground after heat treat, and a hard chrome-lined gas key for superior wear resistance. Encased in a QPQ Nitride coating, the entire carrier assembly offers a hard, smooth surface with enhanced corrosion resistance and a low coefficient of friction. Lantac's patented CP-R360 domed cam pin, crafted from 17-4PH stainless steel and hardened to H900, reduces wear while promoting ultra-smooth upper-receiver interaction. Forward porting with enlarged vents and a balanced flared boss improve gas flow, reduce pressurization when running suppressors, and promote a flatter, cooler, cleaner cycle with a softer start to carrier movement. Weighing 11.7 oz, with mil-spec gas rings, a properly staked gas key, and Grade 8 hardened fasteners, this E-BCG delivers reliability, timing, and longevity, proudly made in the USA with a lifetime warranty.