Centennial Defense Systems MOD3 Upper Parts Kit for Gen 1-3 Glock 19 Hi-Viz Orange Torx Screw 13lb Spring. Specifications for Centennial Defense Systems MOD3 Upper Parts Kit for Gen 1-3 Glock 19 w/Torx Screw: Manufacturer: Centennial Defense Systems Fabric/Material: Stainless Steel Gun Make: Glock Gun Model: Glock 19 Model Generation: 3 2 1 Package Contents: Centennial Defense Systems MOD3 Upper Parts Kit for Gen 1-3 Glock 19 w/Torx Screw Stainless Steel Guide Rod Assembly (Torx Screw) Stainless Steel Channel Liner Stainless Steel Firing Pin Firing Pin Spring Firing Pin Spacer Sleeve Spring Cups (2) Stainless Steel Firing Pin Safety Firing Pin Safety Spring Stainless Steel Extractor Stainless Steel Extractor Depressor Plunger Extractor Depressor Plunger Spring Spring-Loaded Bearing Aluminum Slide Cover Plate What firearm models does the manufacturer say Centennial Defense Systems MOD3 Upper Parts Kit for Gen 1-3 Glock 19 w/Torx Screw is compatible with? The manufacturer suggests that Centennial Defense Systems MOD3 Upper Parts Kit for Gen 1-3 Glock 19 w/Torx Screw is compatible with Glock 19Centennial Defense Systems 51197: MOD3 Upper Parts Kit for Gen 1-3 Glock 19 Hi-Viz Orange Torx Screw 13lb Spring