The GRGM21M features a basswood (later poplar) body bolted to a 22" (560mm) maple neck with a 24-fret maple fingerboard with dot position markers. Components include dual Ibanez Powersound humbucking pickups and a standard hard-tail bridge. The GRGM21M was offered as part of the IJM21M Jumpstart package also containing a practice amp and various accessories sold in the US. The "Black night" (BKN) color was available only as part of this package. The GRGM21M is also sold with a gig bag with a package model number of GRGM21MGB.