Help required, Electrical Gun Using Particle Emitter.

Hi, Since last two days, I am working on create a electrical gun with fires number of electrons. After trying different things I am done with the effect but I am now stuck with the collision detection. I used World Particle Collider but somehow its not working.

What I am doing: Darg a gun mesh in a scene and attached following components:- 1. Rigidbody. 2. Sphere Collider. 3. Ellipsoid Particle Emitter. 4. Particle Renderer. 5. World Particle Collider (for Particle Collision Detection)

Please help me what and where I am doing wrong OR suggests me any other idea/solution to achieve this.

Thanks in advance.