The VP Series integrates a striker firing system with an enhanced, HK "light pull" trigger. HK's cold hammer-forged barrel made from cannon grade steel ensures long service life, as does the polygonal bore profile which also provides a slight increase in muzzle velocity. An extended Picatinny MIL-STD-1913 rail molded into its polymer frame for mounting lights and accessories. All controls are completely ambidextrous. A unique VP feature is HK's patented rear-mounted charging supports on each side of the slide provide better gripping leverage for racking the slide rearward.