Grand Power is a Slovak firearms manufacturer founded in 2002. Many of its pistols, including the K100 series, use a rotating barrel locking system that reduces recoil and improves accuracy. The lineup includes the K100 MK12, X-Calibur, and P1 Ultra, chambered in 9mm, .40 S&W, and .45 ACP. Most models have ambidextrous controls and are available with optics-ready slides and Picatinny rails.