Centennial Defense Systems Lower Parts Kit for Gen 1-3 Glock 19 Serrated 5lb Mag Catch Spring 5lb Trigger Spring Satin Aluminum. Specifications for Centennial Defense Systems Lower Parts Kit for Gen 1-3 Glock 19: Manufacturer: Centennial Defense Systems Fabric/Material: Stainless Steel Gun Make: Glock Gun Model: Glock 19 Model Generation: 3 2 1 Condition: New Package Contents: Centennial Defense Systems Lower Parts Kit for Gen 1-3 Glock 19 Trigger Housing with OTS Magazine Catch Spring (2.5lb or 5lb) Slide Lock Spring Trigger Spring (5lb or 6lb) 3.5lb Connector Extended Slide Release Extended Mag Release (Serrated or Stippled) Extended Slide Lock Lever Trigger Pin Trigger Housing Pin Locking Block Pin What firearm models does the manufacturer say Centennial Defense Systems Lower Parts Kit for Gen 1-3 Glock 19 is compatible with? The manufacturer suggests that Centennial Defense Systems Lower Parts Kit for Gen 1-3 Glock 19 is compatible with Glock 19Centennial Defense Systems 50162: Lower Parts Kit for Gen 1-3 Glock 19 Serrated 5lb Mag Catch Spring 5lb Trigger Spring Satin Aluminum