The GRG121DX is an RG series solid body electric guitar model introduced by Ibanez in 2012. It is as part of the entry-level GIO line. The GRG121DX features a one-piece maple neck with a 24-fret rosewood fingerboard with sharktooth inlays and two covered humbuckers with a 3-way selector switch. It is a hard-tail model.
 
PRODUCT DETAILS
 
Body
Body type: Solid body
Body material: Mahogany, basswood, poplar or okoume
Neck joint: AANJ
Bridge: 
2012–2017: Fixed bridge
2018–2020: Ibanez F106 
fixed (10.5mm string spacing)
Knob style: Plastic dome
Hardware color: Black
Neck
Neck type: GRG
Neck material:1-piece maple
Scale length: 648mm/ 25½"
Fingerboard material: 
2018–2019: Treated New Zealand pine w/ binding
2020: Purpleheart w/ binding
Fingerboard inlays: Sharktooth
Frets: 24 / jumbo
Machine heads: Ibanez die-cast
Electronics/ Strings
Pickup configuration:: HH
Bridge pickup: Ibanez IBZ-6 (H) passive/ ceramic
Neck pickup: Ibanez IBZ-6 (H) passive/ ceramic
Controls: 
2012–2018: Master volume / master tone / 3-way lever
2019–2020: Master volume / master tone / 5-way lever
String gauge (factory): 010/.013/.017/.026/.036/.046