M. Upgrader
Used for Upgrading Manufacturer Weapons in The Arms Carnival event. There are 5 categories of M. Upgrader ranging from +1 to +5 and you must find one of each level in order to fully upgrade your chosen weapon.
| Mfr. Weapon Level | Item Needed to Upgrade |
|---|---|
| Mfr. Weapon | M. Upgrader+1 |
| Mfr. Weapon+1 | M. Upgrader+2 |
| Mfr. Weapon+2 | M. Upgrader+3 |
| Mfr. Weapon+3 | M. Upgrader+4 |
| Mfr. Weapon+4 | M. Upgrader+5 |
Mfr. Weapon+5 is the final upgrade tier and there are no M. Upgraders beyond +5.