The AR Charging Handle (ARCH) from Strike Industries is built for durability. It is constructed from 7075 T-6 aluminum with a black hard anodized finish. The high polished surface, and ergonomic design makes for a smooth, clean charge. Its gas busting ability diverts harmful gases, oil, and dirt away from the shooter. This model is for AR15 platforms.The new SI ARCH or (AR Charging Handle from Strike Industries) is a 7075 T6 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. Once you place the ARCH on your rifle, you will see, feel, and know the quality of the ARCH. Features: High polish surface for smooth charging Forge process Built for durability Great ergonomic feel