The crows foot for AR-15/M4 GI spec castle nuts is a specialized tool designed for precision and ease of use when working with telescoping stock tubes. This tool is compatible with both 1/2 inches and 3/8 inches drive systems, ensuring versatility and adaptability for various applications. Engineered to meet GI specifications, it provides a secure and reliable fit, making it an essential accessory for firearm maintenance and assembly. Whether you are a professional gunsmith or an enthusiast, this tool offers the durability and functionality needed for efficient and effective work on AR-15 and M4 platforms. Crows feet for AR15/M4 GI specification castle nuts for telescoping stock tubes Compatible with 1/2 inches and 3/8 inches drives Structural steel fabrication