Zaffiri Precision Complete Upper for Glock 43/43X includes a slide, barrel, internal parts, and sights. Single billet 17-4 stainless steel slides are made with tight tolerances increasing accuracy and performance. 100% American made and manufactured in-house at their facility. These are among the best aftermarket slides available for Glock.Features :ZP G43 Slide - Shield RMSc/Holosun K/SRC Optic CutZP G43/43X Barrel - Flush/CrownHD Fiber SightsG43/43X Gen 3 Upper Parts Kit with polymer Recoil Spring AssemblyZPS.2 Cut