This is a paid asset, but now you can download Railgun – Weapon Systems Pack for FREE, but please remember this package is provided only for learning purposes or to be able to test before buying the product, NOT FOR COMMERCIAL PURPOSES.
Detail this asset from Unity Store: Original Link
Railgun – Weapon Systems Pack v3.0
Railgun – Weapon Systems Pack has 10 levels of Railgun Weapons Firing and Hit effects. The pack also includes a fully-functional demo scene showing setup and usage of the railgun weapons system with a complete, working, and upgradable Dual-Railgun Turret to add to your game.
Try the Webplayer Demo Here!
– 10 Levels of Railgun Weapon Effects
– Easy to use scripts written in C#
– Bonus: Fully-Functional and Setup Demo Scene
– Bonus: Complete Dual-Railgun Cannon Turret with Target Tracking