Manne Guitars - Handcrafted instruments from Italy.
Mari by RediVivus - Electric guitars made in Italy.
Martin Dixon Handmade Guitars - Custom guitar builder in the UK.
Matlin Guitars - Establishment in California that repairs and builds custom guitars.
McNaught Guitars - Fine hand made electric guitars.
MDX Guitars - Design your own guitar.
MEG - Modular Electric Guitars - Electric guitars with interchangeable body and neck modules.
Melancon Guitars
Mentyjaervi Guitars - Guitars from Norway.
Metropolitan Guitars
Mayones - Largest electric, bass, and acoustic guitar maker in Poland.
Miller Instruments - Carbon fiber guitars and basses (including upright).
M J Guitar Engineering - Hand made guitars.
Modulus Guitars
Monterey Guitars - Acoustic and electric instruments from down under.
Moon Guitars - Acoustic and electric guitars, plus mandolins.
Moonstone Guitars - Handcrafted electric and acoustic guitars
Morch Guitars - Danish made guitars
Mosby Guitars - Custom guitars and repairs.
Music Man/Ernie Ball - Guitars, basses, strings and accessories.