Basically a 7-string RG series model, several modifications were made up by Munky and Head, including a mahogany wood body, custom DiMarzio pickups (PAF 7) with simplified controls and their signature U-bar. They also came factory tuned to Korn's signature tuning: A, D, G, C, F, A, D (low to high).
The K7 guitars were originally available in two finishes: Blade Gray (Brian "Head" Welch's model), and Firespeak Blue (James "Munky" Shaffer's model).
After Head parted ways with Korn in 2005, Ibanez replaced the K7 series with the new APEX series in 2007. These are linked to Munky only, however K7's can still be seen played by Munky and Head in several situations.
The U-bar is an alternative for the standard tremolo arm. It lets you palm the bridge to get tremolo effects without touching the fine tuners. The K7 models came with a specially modified Lo-Pro Edge 7 tremolo to accommodate the U-bar but also came with a standard arm for traditional set-up.