Electric guitar · solidbody
Neck-through; carved top; back belly cut; stainless frets; Luminlay side dots; Hipshot Grip-Lock tuners; baritone scale options
| Body Style | solidbody |
| Top | Flamed Maple |
| Body | Swamp Ash (Mahogany/Sapele optional) |
| Neck | 11-ply Maple-Mahogany-Amazakoe-Wenge |
| Fingerboard | Ebony |
| Neck Pickup | Velvetrone Solium (humbucker) |
| Bridge Pickup | Velvetrone Ironside (humbucker) |
| Pickup Switch | 5-way lever |
| Controls | 1x Volume, 1x Tone |
| Electronics | Passive; Mayones Treble Bleed Mod |
| Construction | neck-through-body |
| Bridge | Hipshot Fixed guitar bridge |
| Made In | Poland |
Artists documented playing the Mayones Regius Core 7: Acle Kahney, Adel Rouhnavaz, Anders Hoyvik Hidle, Bart Hennephof, Carlos Lozano, Dan McNally, Ehsan Imani, Eimel Trejo Lobo, Filipe Baldaia, Hellana Pandora, Hovak Alaverdyan, Ivan Marin, Keshav Anand Dhar, Mick Gordon, Mike Larriba, Morgan Thomaso, Rick Schneider, Ruud Jolie, Ryan Siew, Sithu Aye, Tobal, Tobias Stulz.