Centennial Defense Systems Stainless Steel 3.5 Connector for Gen 1-5 Glock No Coating. 5 Connector provides a smoother lighter trigger pull while maintaining reliability and has no affect on the trigger reset. It is designed to be a drop in component and does not require any fitting. Fits all Gen 1-5 Glock models except G424343X48 and all Polymer80 except single stack models. Specifications for Centennial Defense Systems Stainless Steel 3.5 Connector for Gen 1-5 Glock: Manufacturer: Centennial Defense Systems Color: Stainless Steel Fabric/Material: Stainless Steel Gun Make: Glock Gun Model: Universal Model Generation: 5 4 3 2 1 Package Contents: Centennial Defense Systems Stainless Steel 3.5 Connector for Gen 1-5 Glock What firearm models does the manufacturer say Centennial Defense Systems Stainless Steel 3.5 Connector for Gen 1-5 Glock is compatible with? The manufacturer says that Centennial Defense Systems Stainless Steel 3.5 Connector for Gen 1-5 Glock is compatible with UniversalCentennial Defense Systems 20769: Stainless Steel 3.5 Connector for Gen 1-5 Glock No Coating