Ed Brown Products EVO Series Flat Wire Recoil System Stainless 9mm 15lb. The self contained system makes disassembly and reassembly a breeze Recommended spring replacement at 30000-40000 rounds. Specifications for Ed Brown Products EVO Series Flat Wire Recoil System: Manufacturer: Ed Brown Products Color: Silver Finish: Stainless Fabric/Material: Stainless Steel Gun Make: Ed Brown Gun Model: Ed Brown EVO-E9 Package Contents: Ed Brown Products EVO Series Flat Wire Recoil System Stainless steel guide rod Long lasting chrome silicon flat wire spring Reverse plug for the Ed Brown EVO Series What firearm models does the manufacturer say Ed Brown Products EVO Series Flat Wire Recoil System is compatible with? The manufacturer says that Ed Brown Products EVO Series Flat Wire Recoil System is compatible with Ed Brown EVO-E9Ed Brown Products 889-FW-EVO: EVO Series Flat Wire Recoil System Stainless 9mm 15lb