The RGD420 is an RGD series guitar introduced in 2012 as the replacement model for the RGD320Z. The RGD420 removed the tone knob, pickup selector, and check mark inlays, and included a new mid-cut EQ switch and black pearl dot inlays. A hard-tail version of RGD420 was also introduced that same year, called the RGD421.
The RGD420 features a 26.5" scale neck and comes a full-step down in factory D-Standard tuning (DGCFAD). Other features include a Wizard III neck, Edge Zero II tremolo, and CAP-VK1 and CAP-VK2 passive pickups.