Cross Armory Slide Lock for Glock Gen1-5 Extended Red 4140 Steel Cross Armory for Glock Extended Slide Lock Fits All for Glock Gen1-5. Designed Specifically For Gen 5, Our Extended Slide Lock Is a Perfect Fit For Gen 5 And Previous Models. *Note The Cross Armory Slide Lock Fits Gen 5 But Is Also backwards Compatible With All Gen 1-4. The Extended Slide Lock improves Slide Removal For Cleaning And Maintenance Work, a Necessity For Any for Glock Enthusiast looking To Improve Their Weapon. Does Not Interfere With Any Holster. Model: Slide Lock Material: 4140 Steel Finish: Red