The SI ARCH or (AR Charging Handle from Strike Industries) is a 7075 T-6 forged hard anodized charging handle that functions with ease. With its high polished surface, its ergonomic design makes for a smooth, clean charge. The quality of the ARCH is second to none, it's built for durability. Its gas busting ability diverts harmful gases, oil and dirt away from the shooter. Once you place the ARCH on your rifle, you will see, feel, and know the quality of the ARCH!