Description 43818 Wolff Glock 19 23 32 Factory Standard Recoil Spring Wolff recoil springs for use in Glock pistols are available with load-rated specifications to tailor the recoil function to individual needs. Due to the design of the Glock pistol, all Glock recoil springs now include a factory strength replacement striker spring.    NOTE: Wolff recoil springs for Glock pistols are not captive. We highly recommend using them in  conjunction with Wolff guide rods listed below.   Note: Not for use in Generation 4 pistols.   For Use In:      Glock 19, 9mm     Glock 23, .40 S&W     Glock 32, .357 Sig       Please See Ratings Below  •Reduced Power…: 15 & 17 Lb.  •Factory Standard.: 18 Lb.  •Extra Power……..: 19, 20, 22 & 24 Lb.   IMPORTANT NOTE: Factory recoil spring ratings above are for current production models with captive factory recoil spring systems which are silver/gray in color. Previous captive factory recoil assemblies for the 19 and 23 had recoil springs rated at 17 pounds