HK VP9 Upper Parts Kit – Factory OEM Upgrade. The HK VP9 Upper Parts Kit is a genuine factory OEM assembly containing all upper components for the VP9 pistol. Includes barrel, recoil spring assemblies, striker components, extractor, firing pin safety, and other small parts. Precision-machined in Germany for reliability and performance. Ideal for replacements, upgrades, or spare builds. Brand: Heckler & Koch (HK). Model: VP9 Upper Parts.