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At A Glance
- Neck Type
- GRGM / Maple neck
- Top/Back/Body
- Basswood body
- Fretboard
- Maple fretboard / Black dot inlay
- Fret
- Medium frets
- Number of Frets
- 24
- Bridge
- Ibanez F106 bridge
- String Space
- 10.5mm
- Neck Pickup
- Infinity R (H) neck pickup (Passive/Ceramic)
- Bridge Pickup
- Infinity R (H) bridge pickup (Passive/Ceramic)
- Factory Tuning
- 1E,2B,3G,4D,5A,6E
- Strings
- -
- String Gauge
- .010/.013/.017/.026/.036/.046
- Nut
- Plastic
- Hardware Color
- Chrome
- Scale
- 22.2
- A : Width
- 41mm at NUT
- B : Width
- 56mm at 24F
- C : Thickness
- 19.5mm at 1F
- D : Thickness
- 21.5mm at 12F
- Radius
- 400mmR
- Color
- Orange Burst
- Series
- miKro
Ibanez built the GRGM21MORB as part of the miKro Series, a line engineered around a reduced scale length and compact dimensions. The guitar sat at the entry level of the GRG family, intended for players who required a shorter reach — notably younger players or those transitioning from a smaller instrument.
The GRGM21MORB was constructed with a basswood body and a maple neck carrying a maple fretboard with black dot inlays. Twenty-four medium frets ran the length of the board over a 400 mm radius, with a 41 mm nut width and a scale length of 22.2 inches. The neck measured 19.5 mm thick at the first fret and 21.5 mm at the twelfth. A plastic nut seated the strings, which were spaced 10.5 mm at the Ibanez F106 bridge. Two passive, ceramic-loaded Infinity R humbucker pickups — one at the neck, one at the bridge — handled the signal chain. All hardware was finished in chrome. The guitar shipped in standard E-to-E tuning with a .010–.046 gauge string set.
Owners sourcing replacement parts — including bridge saddles compatible with the F106, or pickups matching the Infinity R format — should consult a qualified guitar technician who can verify fit against the instrument's actual dimensions before installation.
STRAIGHT TALK
What Stands Out
Keep In Mind
From the people who own them
Nothing in The Vault is for sale. These records exist so the instruments stay documented after the manufacturer moves on — and the most useful part of that record is what owners add to it.
Owner photos
Put yours on the record.
The catalog shot showed one finish, under one light, a long time ago. Yours has been played. Photos from owners are what the next person finds when they are trying to identify a part, match a finish, or work out whether the one they just bought is really what the seller said it was.
What do you know about this one?
Specs only go so far. What actually fits, what breaks first, what the factory got right and what everyone ends up changing — that lives with the people who own them, not in a datasheet. Post what you know and it stays on this page for whoever comes looking next.
Build Your Complete System
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Gear Help, Handled
From spec questions to full builds — players who have lived this gear since 2007.
Since 2007
Fit & Compatibility
- Bridge, tuner, and nut fit confirmed for your guitar
- Pickup and electronics compatibility checks
- Pedal power and amp/cab impedance matching
Mods & Upgrades
- Upgrade paths for the guitars you already own
- Wiring, routing, and hardware swap guidance
- Advice from people who actually do the mods
The Vault
- Discontinued and EOL guitars kept on record
- Specs, history, and known part compatibility
- Share your builds and mods with the community
