Dominate any range with this precision-crafted M16 Bolt Carrier Group (BCG). Designed for seamless compatibility with 5.56 NATO and .300 Blackout this BCG ensures flawless cycling and extraction in any build. Every component is treated with a premium nickel boron finish for exceptional corrosion resistance ultra-low friction and effortless cleaning delivering smoother operation than standard coatings. Built to exacting Mil-Spec standards it’s the ultimate choice for reliability and performance. Precision-machined 9310 steel bolt and 8620 steel carrier fully nickel boron coated Compatible with 5.56/.223 and .300 Blackout barrels for versatile performance Full nickel boron finish for superior lubricity and wear resistance Mil-Spec construction with staked gas key and shot-peened bolt for rugged reliability