NDZ Performance Stainless Steel Guide Rod Single Spring Assembly with 22lb ISMI Spring For GLOCK Gen 4 only (Black Adapter) G20 21

NDZ Performance stainless steel guide rods provide a decisive advantage for all Glock owners. Special features include a rigid stainless steel body that improves lock up by completely removing "guide rod flex". The hex screw removable tip allows the user to choose various spring weights that will calibrate the ammunition to his gun. Used by Law Enforcement and competitive shooters world wide, will not chip or crack like the factory plastic guide rods are prone to do. Will not damage or wear your polymer frame and guaranteed to provide a lifetime of reliable service. We recommend the use of Blue Loctite on the hex screw threads. This will provide a firm hold and still allow easy removal when necessary. ISMI premium springs are manufactured exclusively with certified aerospace specification alloys; stainless or chrome silicon. Then the springs are heat treated, shot peened and stress relieved after winding to enhance performance and durability. What Recoil spring Weight do you need? 11 - 13 lb Spring weight is typically used for Competition Shooting, or if you are using a Recoil Compensator on your Barrel. A lighter weight Recoil spring allows for a faster recoil time. This allows the shooter to stay on target longer and makes target re-acquisition, Faster and Easier. 17 - 18 lb Glock Factory Weight Recoil Springs 19 - 24 lb Recoil Springs are for Heavy Power Ammunition Loads +p or +p+ Please Make sure you are using the correct loads for the springs or you will have cycling issues.