The FailZero Bolt Carrier Group (BCG) with Hammer is an essential upgrade for any serious M16 or AR-15 enthusiast. Completely assembled and ready for installation, this BCG offers unmatched reliability and performance thanks to its state-of-the-art EXO coating. Durability is embedded in its design, featuring a high-quality nickel finish that significantly enhances wear resistance and reduces friction, ensuring smoother operation and prolonged life. The FailZero BCG is meticulously crafted to function flawlessly under the most demanding conditions, offering you peace of mind whether you're at the range or in the field. This premium bolt carrier group stands out with its rugged construction, promising consistent performance in every use. FailZero’s dedication to precision and excellence is evident in this product, making it a must-have for those looking to enhance the dependability and efficiency of their firearm. Trust in FailZero's advanced engineering to bring out the best in your weapon.