The RG657PB features a poplar burl top on a mahogany body bolted to a maple and walnut Super Wizard HP neck with a 24-fret rosewood fingerboard with white dot position markers. Components include DiMarzio pickups with a pair of humbuckers flanking a single-coil which are mounted directly to the body, an Edge double locking tremolo bridge with a locking nut and Gotoh tuning machines.
For 2018 the body wood was specified as African mahogany.
The RG657K is a similar model with a basswood body with a koa top. The RG657MSK is a related model with a mahogany body with a silky oak top and a maple fretboard.