Heavy Cannon Hardpoint
Required Research:

Engineering Breakthrough

Fuel Injection Engine

Power Module

Machinegun

Hardened MG Bullets

Cyborg Factory

Light Cannon

Hardcrete

Light Cannon Hardpoint

Factory Module

Cobra

Sensor Turret

Guard Tower

Sensor Tower

Command Relay Post

Research Module

Composite Alloys

Bug

Composite Alloys MK2

Python

HEAT Cannon Shells

Medium Cannon

Medium Cannon Hardpoint

Heat Cannon Shells
Mk2,Mk3

Heavy Cannon

Heavy Cannon Hardpoint