Particle System Sprite Randomization

Hi, I’ma making an FPS game and I am trying to achieve similar muzzle flash particle effects seen in most FPS game such as CSGO, Battlefield and Payday 2. The actual issue is not getting the particle effect to fire but rather randomizing the sprites that show every time the emitter fires. I thought the Texture sheet animation would help me but it’s function didn’t really help. Any help would be kindly appreciated.

Like having a array of textures and having a int “selectedtexture” and changing the int by a random number?