Upper Parts Kits

Upper parts kits (UPKs) include the internal slide components needed to complete your build — firing pin, firing pin spring, extractor, extractor depressor plunger, spring-loaded bearing, slide cover plate, and channel liner. These precision components work together to ensure reliable ignition, extraction, and ejection. Our upper parts kits use OEM-spec or enhanced aftermarket components manufactured to strict dimensional tolerances. Available for all Glock-compatible slide configurations. Essential companion to your lower parts kit for a complete internal build.