The M4m represented the military variant of the M4 Series Messenger Droid manufactured by Cybot Galactica. While nearly indistinguishable from its commercial counterpart, it featured a compact, integrated sporting blaster for data security. The M4m's price was 4,000 credits, which is twice the price of the original M4.
- Galladinium's Fantastic Technology (Initial Mention)
- " Cynabar's Droid Datalog " — Star Wars Adventure Journal 14 (First identification as the M4m)