Upgraded Gun Turrets expands the vanilla gun turret into four powerful MK tiers, each with distinct green/blue/red/purple coloring and high-quality custom icons.

Key features:
- MK1–MK4 progression with steadily increasing health, range, damage modifier, ammo slots and fire rate (cooldown decreases by 1 tick per tier).
- New recipes using tungsten plates, tungsten carbide, superconductors, supercapacitors, carbon fiber, ammonia, quantum processors, promethium asteroid chunks, and cold fluoroketone.
- MK3 and MK4 recipes require a cryogenic plant for final assembly.
- Rebalanced technology packs per tier, incorporating Space, Electromagnetic, Agricultural, Cryogenic, and Promethium science packs.
- Dynamic tech compatibility: all physical-projectile-damage technologies automatically apply their turret‑attack bonus to upgraded turrets, ensuring full vanilla research synergy.
- Custom item, entity and technology icons plus refined mask tinting (inherited from the Rocket Turret upgrade logic) for consistent, high-quality visuals.
- Requires the Space Age DLC.