Kimber 1911 Recoil Spring Replacement Guide The recoil spring on any semi-automatic gun is critical to the proper performance of the firearm. Each spring has a particular rating relating to how many pounds of force it takes to compress it by one inch. When a spring undergoes many compressions over time, it will become weaker. I have created a chart below listing the correct recoil springs for popular 1911 models. Springs wear out and need to be replaced at a…