Changes
→Possible Upgrades
| <font color="#ff0000">'''''Impossible to upgrade'''''</font>
| <font color="#ff0000">'''''Impossible to upgrade'''''</font>
|-
|-
| rowspan="2" |{{RedGunHeavy}} Heavy Gun
| rowspan="5" |{{RedGunHeavy}} Heavy Gun
|[[35.6cm Twin Gun Mount]]
|[[35.6cm Twin Gun Mount]]
|[[Prototype 35.6cm Triple Gun Mount]]
|[[Prototype 35.6cm Triple Gun Mount]]
|-
|[[38cm Twin Gun Mount Kai]]
| <font color="#ff0000">'''''Impossible to upgrade'''''</font>
|-
|-
|[[41cm Twin Gun Mount]]
|[[41cm Twin Gun Mount]]
| <font color="#ff0000">'''''Impossible to upgrade'''''</font>
|-
|[[46cm Twin Gun Mount Prototype]]
|[[46cm Triple Gun Mount]] ★+5
|-
|[[46cm Triple Gun Mount]]
| <font color="#ff0000">'''''Impossible to upgrade'''''</font>
| <font color="#ff0000">'''''Impossible to upgrade'''''</font>
|-
|-