High Grade

During the mid- to late-1980s, the quality of molding improved and HG (High Grade) level kits were introduced in 1990, starting from the titular mobile suits of the first four TV series. These limited-run kits featured full snap-fit assembly, an "internal frame" (for the first two kits, which provides better range of motion and were more poseable), and utilized the molding technique known as System Injection, wherein multiple colors would be cast on the same part.