Our friends at the Colt Custom Shop graciously supplied us with some of the dual recoil springs and guide rods for long term testing in other 1911 platforms. As seen in my earlier article on the M45 Spring System, the dual spring system does function in a standard 1911 platform, but we will be looking at long term results, such as long term reliability and whether or not there are adverse effects on the slide and frame. Stay tuned!