Shadow Systems Locking Block Black. Fits Glock G17 G19 and G23. Specifications for Shadow Systems Locking Block fits Glock 19: Manufacturer: Shadow Systems Color: Black Fabric/Material: Tool Steel Gun Make: Glock Gun Model: Glock 19 Additional Features: Fits Glock 19 2 Pin Frames Gun Type: Pistol Package Contents: Shadow Systems Locking Block fits Glock 19 What firearm models does the manufacturer say Shadow Systems Locking Block fits Glock 19 is compatible with? The manufacturer says that Shadow Systems Locking Block fits Glock 19 is compatible with Glock 19Shadow Systems SG9C-01-24: Locking Block Black