DPM Mechanical Recoil Reduction System for Springfield HellCat Pro 3.7″ Soft Version The DPM Mechanical Reduction System is a direct replacement for the stock recoil rod and does not change the configuration of the pistol.  The system includes 2 Spring Plugs and 3 different external springs. The Spring Plug must always be installed when the DPM Recoil Rod and springs are used. **As we lead the evolution of recoil reduction technology, products may change versions (new design with different springs, with or without plugs, washers, etc.) without any prior notice.** Power Rates Slide on the battery Short Spring: 7lbs Medium-Short: 8lbs  Medium-Long Gold: 9lbs Long Spring:  10lbs Slide full open position - Total Power Short Plug: 14lbs (approx.) Long Plug: 16lbs  (approx.)  Overall Advantages Faster follow up shots Improved firing speed Slide and Frame Protection Elimination of jams Significant recoil reduction Better double-tap concentration Better control and greater accuracy Lifetime Warranty.  For changes to features, like comp set-up, threaded barrels, slide conversions etc., contact us via email at info@dpmsystems.com before placing your order. In some cases, we need to determine whether a custom product is required. Millions of our patented products are in service to military, law enforcement, sports and civilian firearms around the world.