K.I.S.S. stands for the Kwik Intelligent Shooting System reticle. According to the manufacturer, it features "a large chevron that grabs the eye instantly, yet provides an infinitely small aiming point without obscuring your target. For shooters looking for a close to medium range reticle that presents a smart sight picture instantly, the K.I.S.S. reticle delivers ultimate speed with no unnecessary baggage. The second focal plane (SFP) design keeps the reticle the same size at all magnifications for quick acquisition at any power setting."