The M series bows are slightly heavier than the S series bows, though still very lightweight by normal standards, and produce a more focused tone with a longer sustain. The additional mass makes them slightly less agile, but steadier on the string and easier to control. The M4 has a mother of pearl eye, sterling silver ferrule, and a black and silver winding. The M4 also has a faster response than the M3 and a more complex tone color.
| Stick | Round Only |
| Weight | 53 Grams (1.87 oz.) |
| Frog | Snakewood |
| Eye | Mother of Pearl |
| Winding | Black & Silver |
| Grip | Leather |
| Slide | Mother of Pearl |
| Ferrule/Lining | Sterling Silver |
| Button | Snakewood |
| Screw | Steel |
| Tip-Plate | Silver |