Centennial Defense Systems Stainless Steel Trigger Housing Pin for Gen 4-5 Glock Stainless Steel No Coating. It is precision ground from high quality stainless steel to be a direct replacement for most Glock models with no extra fitting required. Specifications for Centennial Defense Systems Stainless Steel Trigger Housing Pin for Gen 4-5 Glock: Manufacturer: Centennial Defense Systems Fabric/Material: Stainless Steel Gun Make: Glock Model Generation: 5 4 Package Contents: Centennial Defense Systems Stainless Steel Trigger Housing Pin for Gen 4-5 Glock Centennial Defense Systems 20065: Stainless Steel Trigger Housing Pin for Gen 4-5 Glock Stainless Steel No Coating