In 2008 Gibson released two new versions of the guitar, the first of which was the "50-Year Commemorative Explorer". This version features a solid mahogany body with AA-grade maple top, and the body style is the so-called "new retro Explorer", which has rounded edges. The second is called the "Reverse Explorer" due to its inverted body style. The reverse model features a carbon fibre-like pickguard and inlays as well as a McCarty-era inspired headstock. Only a limited run of 1000 of each model were built for the Guitar of the Month feature. In the same year Gibson also released the Robot Explorer, an Explorer version of the Gibson Robot Guitar together with a similar version of the Flying V featuring custom red metallic nitrocellulose finish, ebony fingerboard with white lining and trapezoid inlays, and lacking a pickguard. Production of this guitar was discontinued in 2008.