Ibanez Wiki
2015 Ibanez GRGM21.gif
GRGM21 Black Night and White (more images) Red copyright sprite.png

The GRGM21 is a compact RG-style solid body electric guitar model introduced by Ibanez for 2006. It is the initial entrant in the miKro series guitar line, which features slightly downsized instruments aimed at smaller players. It is produced in China as part of the entry-level GIO line.

The GRGM21 features a solid wood body (see specs for specific species) bolted to a maple neck with a 24-fret fingerboard with sharktooth position markers. Components include dual Ibanez humbucking pickups and a fixed bridge.

In mid-2017 a new fretboard material, treated New Zealand pine, replaced rosewood.[1] For 2018 the bridge was identified as the F106. For 2019 the fretboard material was changed to Jatoba, the body was once again basswood and the 3-way lever pickup selector was replaced with a 5-way.

The GRGM21 was also sold in some markets as a set with a special gigbag as the GRGM21GB.[2]

Similar models and special editions

Size comparison of the Mikro and the "full-size" RG.

The GRGM21L is a left-handed version. The GRGM21M is a similar model with a maple fingerboard with dot inlays. The GRGM22QA is a similar model with a gravure quilted maple top. The GRGM21N is a very similar model.

Several GRGM21 limited edition models have been produced, including:


Specifications for GRGM21
Model name: GRGM21 / GRGM21GB / IJM21
Year(s) produced: 2006–2021
Sold in: Worldwide
Made in: China
Finish(es): Black Night (BKN) / Beam Blue (BMB) 2006–2010 [EU only] / Candy Apple (CA) 2007–2008 / Jewel Blue (JB) 2006–2009, 2012–2016 / White (WH) 2006–2016, 2018–2021 / Yellow (YL) 2011–2013 / Vivid Orange (VOR) 2013
Body type:
Solid body
Body material:
2006–2008: Nato
2009–2011: Poplar
2011–2012 [US only]: Basswood
2012 [EU only]: Mahogany
2013–2018: Poplar
2019–2021: Basswood
Neck joint:
2006–2017: Fixed bridge
2018–2021: F106 fixed (10.5mm string spacing)
Knob style:
Plastic top hat (black)
Hardware color:
Neck type:
Neck material:
1-piece maple
Scale length:
564mm/ 22.2"
Fingerboard material:
2006–2017: Rosewood
2017–2018: Treated New Zealand pine
2019–2021: Jatoba
Fingerboard inlays:
24 / medium
Black plastic (41mm)
Machine heads:
2006–2008: Ibanez covered
2008–2021: Ibanez die-cast
Electronics/ Strings
Pickup configuration:
Bridge pickup:
2006–2016: Ibanez Standard/PSND2 (H)
2017–2021: Ibanez Infinity R (H) passive / ceramic
Neck pickup:
2006–2016: Ibanez Standard/PSND1 (H)
2017–2021: Ibanez Infinity R neck (H) passive/ ceramic
2006–2018: Master volume / master tone / 3-way lever pickup selector
2019–2021: Master volume / master tone / 5-way lever pickup selector
String gauge (factory):
Factory tuning:
1E,2B,3G,4D,5A,6E (E Std.)


Additional finishes/ details
GRGM21 BKN.gif
Black Night
GRGM21 BMB.gif
Beam Blue
GRGM21 CA.jpg
Candy Apple
GRGM21 JB.jpg
Jewel Blue
GRGM21 WH.gif
GRGM21 YL.jpg
GRGM21 VOR.jpg
Vivid Orange
HH 3-way toggle.png
Pickup switching diagram (2006–2018)
Controls VT3L.png
Control layout (2006–2018)
HH 5-way single-split.png
Pickup switching diagram (2019–2021)
Controls VT5.png
Control layout (2019–2021)



  1. GRGM21 product page, Ibanez USA (website), archived from the original December 2017
  2. GRGM21GB product page, Ibanez Asia (website), archived from the original December 2017