Cross Armory Standard Lower Parts Kit for Glock 17/19 Black Small. A high quality kit for your new build or rebuild with both slide lock springs one for a compact and one for a full size frame depending on your build. The trigger comes pre-built for quicker assembly NOTE: P80s require an extra pin that comes standard with your P80 kit. Keep this pin Specifications for Cross Armory Standard Lower Parts Kit: Manufacturer: Cross Armory Color: Black Fabric/Material: Steel Gun Make: Glock Gun Model: Glock 17 Glock 19 Model Generation: 3 Condition: New Gun Frame Size: Sub-Compact Compact L Frame Package Contents: Cross Armory Standard Lower Parts Kit Slide Lock Spring Extended Slide Stop Trigger Trigger Spring Trigger Housing Trigger Bar Trigger Pin Trigger Housing Pin Locking Block Pin Slide Lock Magazine Catch Magazine Catch Spring What firearm models does the manufacturer say Cross Armory Standard Lower Parts Kit is compatible with? The manufacturer suggests that Cross Armory Standard Lower Parts Kit is compatible with Glock 19 Glock 17Cross Armory crLPKs: Standard Lower Parts Kit for Glock 17/19 Black Small