TacFire BCG Gas Key AR-15 5.56x45mm NATO Mil-Spec Black. Discover precision and reliability with this meticulously crafted BCG gas key designed for optimal functionality. Explore exceptional features and craftsmanship that seamlessly blend reliability and performance. Upgrade your AR-15 with the Tacfire mil-spec BCG gas Key. Unlock superior shooting capabilities with this high-quality accessory engineered to enhance your firearms performance. Package Contents: TacFire BCG Gas Key AR-15 5.56x45mm NATO Mil-Spec TacFire MAR145: BCG Gas Key AR-15 5.56x45mm NATO Mil-Spec Black