Master Grade (MG) (マスターグレード) is a line of 1/100 scale Gunpla kits of the Mobile Suits in the Gundam meta series. The series was first produced in 1995 as part of the Gundam 15th Anniversary project.
Master Grade kits differ from other 1/100 scale Gunpla with their level of detail, articulation, and proportions second only to the Perfect Grade line. A majority of the kits feature a skeletal inner frame with working hydraulics; some also accommodate LED Units for light-up gimmicks. To give viewers a perspective of the Mobile Suit's size, many MG kits come with 1/100 scale figurines of the pilots or key characters of their respective series; in addition, some kits include 1/20 scale character figures.
Beginning in 2002, veteran mecha designer Hajime Katoki began redesigning various Mobile Suits and releasing them in the Master Grade line under the label of "Ver.Ka" (Version Katoki). In addition, many Mobile Suits from the Universal Century and Cosmic Era timelines have received redesigns under the monikers "Ver.1.5", "Ver.2.0", "Ver.3.0", and "Ver.RM".