This plugin allows to install fully functional turret on any vehicle. An archive contains .asi plugin and a few example models. To activate a turret, press "T" button, while being in vehicle.
upd. 21.01.23 Added compatibility with Widescreen Fix
Password for archive: libertycity
Demonstration Video:
And here's a tutorial video of how to make your own turret:
Install: Place CustomVehicleTurret.VC.asi into the game folder, replace all the models in gta3.img with ones in archive.