The Logitech G9x was a unique customizable mouse from 2009 featuring interchangeable grip shells — a wide comfort shell and a precision grip shell — at 120 grams wired with the Avago ADNS-9800 laser sensor. The concept of swappable outer shells was revolutionary for its time, allowing players to fundamentally change the mouse's shape. Professional Counter-Strike players adopted the G9x during the CS 1.6 and early CS:GO era. Its squat, compact body was unusual among gaming mice and created a distinctive look never replicated since. The G9x developed a cult following, and fans were vocal when Logitech discontinued the design. It remains one of the most uniquely innovative gaming mice Logitech has ever produced.