HK's VP9 Tactical features a threaded barrel manufactured using a cold-hammer forging process from proprietary cannon grade steel. Its polygonal bore profile, with no traditional lands-and-grooves rifling, contributes to longer service life as well as a slight increase in muzzle velocity. The trigger has a short, light take-up with a solid, single action type break followed by a short positive reset. The VP uses HK's ergonomic handgun grip design that includes three changeable backstraps and six side panels, accommodating all hand sizes. A unique VP feature is HK's patented charging supports - simple components mounted on each side of the rear of the slide to provide better gripping leverage for racking the slide rearward. This pistol has an extended Picatinny MIL-STD-1913 rail molded into its polymer frame for mounting lights and accessories; and includes three 17 round magazines.