XProjectile - this plugin will add a projectile system to your game. You can set up projectile speed, gravity, collision channel. Also, you can attach any mesh, particle, or sound to the projectile. XProjectile is great for rockets, bullets, arrows, grenades.
Video on YouTube: https://youtu.be/ORIaNLX2-o4
IMPORTANT: Disable the "EnableDebug" to improve performance!