Burst Projectile Abilities - SmArtKar/AthenaFramework GitHub Wiki

Vanilla projectile launch comp doesn't support burst shots, but you could use Athena's CompProperties_AbilityLaunchProjectileBurst for that. It works similarly to vanilla's CompProperties_AbilityLaunchProjectile but you can specify the amount of shots and delay between them.

    public class CompProperties_AbilityLaunchProjectileBurst : CompProperties_AbilityEffect
    {
        public ThingDef projectileDef;
        public int burstCount = 1;
        public int ticksBetweenShots = 5;
        public SoundDef firingSound;
    }