Used as library for my other mods:
- 
Armored train with modular turrets: 
 https://mods.factorio.com/mod/Armored-train
- 
Armored vehicle and gun boat with modular turrets: 
 https://mods.factorio.com/mod/modular-ifv
- 
Standalone turrets: 
 https://mods.factorio.com/mod/naval-turrets
 
            