The PGMM11 features a basswood body bolted to a 22.2" scale maple neck with a reversed headstock and a 24-fret jatoba fretboard with white dot position markers. Components include a pair of Ibanez Infinity R Humbuckers, a F106 fixed bridge and Ibanez die-cast tuning machines.
As with the other Paul Gilbert signature models, the PGMM21 features painted on "f holes" to help camouflage the controls, which consist of only a master volume and a 5-way lever pickup selector.