RG421EXL is a model name which has been applied to several distinct RG series left-handed guitar models. Features common to all these RG421EXL variants include: an RG-style body, a pair of Quantum humbucking pickups, an All Access Neck Joint, and a fixed bridge. They are all manufactured in Indonesia.
RG421EXL commonly refers to one of these models:
- RG421EXL (2015–2017); mahogany body, pickups mounted in pickup rings, fixed bridge, rosewood fretboard with binding, side-mounted output in metal plate
- RG421EXL (2019); meranti body, pickups mounted in pickup rings, fixed bridge, jatoba fretboard with binding, side-mounted output in metal plate
- RG421EXL (2021–2023); meranti body, pickups mounted in pickup rings, F106 bridge, jatoba fretboard with binding, side-mounted output in metal plate
- RG421EXL (2024); meranti body, pickups direct-mounted, F106 bridge, jatoba fretboard with binding, side-mounted mono-unit output with integrated metal plate