The IDL .40 S&W AR-15 Bolt Carrier Group Gen2 Nitride is designed specifically for .40 S&W AR-15 builds, offering enhanced reliability and performance. The Gen2 configuration ensures compatibility with both Colt-style and Glock-style magazine setups, providing versatility in magazine choice. Constructed from high-quality steel and treated with a nitride finish, this BCG offers superior wear resistance, corrosion protection, and improved durability under high-stress conditions. Its precision machining ensures smooth operation and consistent cycling, making it a reliable choice for .40 S&W AR-15 platforms, whether for tactical use or recreational shooting.