Optimize your AR-15 platform with the Guntec USA GT-UPPER-9-KIT, a complete upper receiver combo kit designed for 9mm performance. This kit offers precision engineering and a reliable construction, ensuring seamless compatibility and enhanced shooting efficiency for enthusiasts and professionals alike. Complete upper receiver assembly for easy installation Durable materials for longevity and performance Designed for 9mm caliber compatibility Includes all necessary components for a complete build Lightweight design for improved handling Elevate your shooting experience with the Guntec USA GT-UPPER-9-KIT, where quality meets functionality.